Transportation Research Record 2557 contains the following papers: Signal Timing for Diverging Diamond Interchanges: Fundamentals, Concepts, and Recommended Applications (Cunningham,C, Schroeder,BJ, Phillips,S, Urbanik,T, Warchol,S, and Tanaka,A); High-Resolution Field Evaluation of Radar-Based Dilemma Zone Protection System (Abbas,MM, Wang,Q, Higgs,B, Sarabi,DZ, Machiani,SG, and Mladenovic,MN); Impact of Green Light Optimized Speed Advisory on Unsignalized Side-Street Traffic (Radivojevic,D, Stevanovic,J, and Stevanovic,A); Innovative Method for Remotely Fine-Tuning Offsets Along a Diverging Diamond Interchange Corridor (Kim,SK, Warchol,S, Schroeder,BJ, and Cunningham,C); Multimodal Data Analytics Comparative Visualization Tool: Case Study of Pedestrian Crossing Design (Khoshmagham,S, Head,KL, Feng,Y, and Zamanipour,M); Understanding the Factors Underlying Variation in Detection Errors of Video- and Thermal-Imaging Cameras (Yang,J, Zuo,B, and Kim,SH); Performance Analysis of Centralized and Distributed Systems for Urban Traffic Control (Chow,AHF and Sha,R); Predictive–Tentative Transit Signal Priority with Self-Organizing Traffic Signal Control (Moghimidarzi,SB, Furth,PG, and Cesme,B); Efficient Priority Control Model for Multimodal Traffic Signals (Zamanipour,M, Head,KL, Feng,Y, and Khoshmagham,S); Safety-Related Guidelines for Time-of-Day Changes in Left-Turn Phasing (Davis,GA, Moshtagh,V, and Hourdos,J); Characterizing Emergency Vehicle Preemption Operation with High-Resolution Traffic Signal Event Data (Chou,CS and Nichols,AP).
Transportation Research Record 2558 contains the following papers: Arterial Progression Optimization Using OD-BAND: Case Study and Extensions (Arsava,T, Xie,Y, and Gartner,NH); Connected Vehicle–Based Adaptive Signal Control and Applications (Feng,Y, Zamanipour,M, Head,KL, and Khoshmagham,S); Managing User Delay with a Focus on Pedestrian Operations (Sobie,C, Smaglik,E, Sharma,A, Kading,A, Kothuri,S, and Koonce,P); Automated Turning Movement Counts for Shared Lanes: Leveraging Vehicle Detection Data (Santiago-Chaparro,KR, Chitturi,M, Bill,A, and Noyce,DA); Use of High-Resolution Signal Controller Data to Identify Red Light Running (Lavrenz,SM, Day,CM, Grossman,J, Freije,R, and Bullock,DM); Detector-Free Signal Offset Optimization with Limited Connected Vehicle Market Penetration: Proof-of-Concept Study (Day,CM and Bullock,DM); Assessing Longitudinal Arterial Performance and Traffic Signal Retiming Outcomes (Lavrenz,SM, Day,CM, Smith,WB, Sturdevant,JR, and Bullock,DM); Optimal Cycle-Length Formulas for Intersections With or Without Transit Signal Priority (Wolput,B, Christofa,E, and TampèreCMJ); Multimodal Intelligent Traffic Signal System Simulation Model Development and Assessment (Ahn,K, Rakha,HA, Kang,K, and Vadapat,G).
Reliable data provides the foundation upon which transportation professionals base their work. Without reliable data, they are unable to develop solid conclusions and recommendations for a myriad of projects and applications. One of the main forms of data that transportation professionals rely upon in long-range planning projects, more specifically Transportation Master Plans, is origin-destination (O-D) survey data. This data typically identifies where people are traveling, why and how often and helps determine what transportation system changes and improvements will be required to accommodate transportation needs in the future. Oxford County is located in Southwestern Ontario. It covers 2,040 square kilometres (788 square miles) with a 2016 census population of 110,862 persons. The County has five (5) rural municipalities and three (3) urban municipalities and is responsible for the management and maintenance of 614 kilometres of road. In 2016, Oxford County initiated an update to their Transportation Master Plan (TMP). An O-D survey was carried out as part of this update. Oxford County is progressive from the perspectives of sustainability and investment in new and emerging technologies. Instead of utilizing traditional survey methodologies (direct interview, mail out/mail back) to collect the O-D data, the decision was made to use Media Access Control (MAC) address capture technology to record the survey data since use of this technology is in line with the County’s initiatives. The data was collected using Miovision Scout data collection cameras with connected adapters. The adapters captured MAC addresses from Wi-Fi enabled devices within a 30 metre (+/-) radius of each unit. The Scout camera units collect traffic count data concurrent to the MAC address data capture. Use of this technology permitted more data to be collected over a longer period of time at a lower cost. Furthermore, the MAC technology required significantly fewer human resources and allowed data to be collected in a passive manner that did not impact traffic operations or rely on people’s willingness to participate in a survey. With fewer human resources needed within the road allowance, there are also safety benefits to using this technology.
The City of Red Deer wishes to develop a multimodal future. The objective is for all residents – be they on foot, bicycle, in transit or in private vehicle - feel comfortable and safe to travel by their chosen mode. The aim is to provide the space, the design and budget for all modes to travel but without unduly delaying motor vehicles. This is a big task. To shift the space allocations in the public realm to create this future requires deliberate action for the users on the street. To better target the action, an analysis tool was devised. As an example of the utility of an index, the Canadian Forest Service devised the Fire Weather Index (FWI) to establish a common understanding across forest types and topography of relative ‘Fire Weather’. Likewise, it is well understood how motor vehicle Level of Service (LOS) is used and applied to city streets. Similarly, a new measuring tool envisaged providing an objective ‘user view’ to gather what is present which helps or hinders the user from achieving their objective – travel along a corridor or through an intersection – in a consistent manner. It was determined that an easy and transparent spreadsheet measuring quantitative elements by mode and by segment is likely to have the greatest utility, support across departments and potentially be useful in engaging with the public to demonstrate decision choices. As developed, the Multimodal Transportation Index (MTI) measures both the a) current status of a transportation corridor and b) the proposed addition of component parts (elements) users of each mode of transportation require for safety, comfort, quality and connection. It can be used before and after the design process as well as before and after the construction phases. The presence of the elements contributes to a score of A-F, much like conventional LOS, which will encourage the safe and comfortable use of each space to connect to other parts of the city on quality infrastructure. Users of each mode are thereby encouraged to travel these routes with a better experience which translates to higher mode uptake and continued use of the investment. The critical elements form a basis for the planning and design for each space to provide high quality service to city residents and visitors. The elements are a list including the presence of dual para-ramps, boulevard setbacks from back of curb to vehicle travel, presence of street trees, wayfinding, bicycle facility type and appropriate application to road design speed, transit shelters and their amenities, transit travel time and frequency (head way) and pavement quality, among many others. It is anticipated that this will lead to achieving many of the co-benefits and policy goals listed in the City of Red Deer’s Environmental Masterplan, and the Mobility Playbook; and advances the objectives of the Multimodal Transportation Plan and the Neighbourhood Planning and Design Standards, which the City of Red Deer has set. The MTI is a calculated and measured approach towards using the right of way to provide safe travel options, to a standard (A-F) which is acceptable by council and as a benchmarking tool measuring change over time. A series of examples of street views and scores will be presented and well as proposed designs and the resulting MTI score change.
A Canadian city was planning a set of future transit service modifications, including introduction of new bus routes. These would be accommodated at a future neighbourhood bus terminal, with an adjacent park and ride lot. The site was chosen in part because high volumes of traffic currently pass by the location, providing a potential travel market for the new services. West of the site, the adjacent road climbs a hill with grades over 11%. The need for a new bus terminal access near the base of the steep hill has potential operational and safety problems during winter, including downhill stopping and uphill climbing from the bus terminal. These challenges required exploration of several design options, including traffic control, modified intersection configurations, and revised alignments and profiles for the collector road. These options were evaluated with City stakeholder input, considering operational, safety, complete streets and travel time objectives. The final functional design was a combination of a modified profile for the collector road, with a traffic signal introduced at the new access point. This paper describes the design objectives, existing conditions, resulting challenges, options developed, and the considerations that led to selection of the functional design for the bus terminal site access.
Impacts to traffic and the ongoing debate around grade separations are some of the most highly debated issues along planned LRT corridors. Edmonton’s 2017 municipal election brought many related issues to the fore, including: increased demands for the technical rationale behind decisions; a need for a more defined toolkit for decision-making regarding intersection performance; and greater clarity around City vision and project trade-offs. As a result, the City of Edmonton’s LRT Delivery group, in conjunction with other key City personnel and a study of industry best practices, developed a process and accompanying evaluation criteria to both clarify its own processes and assist City Council in making these critical decisions. The framework developed consists of a three phased approach that aims to balance sustainable urban integration principles with impacts to network operations. This framework is being used to guide decisions on both new LRT alignments as well as expansions to the existing network and has recently assisted City Council in making critical decisions along the Valley Line West and Metro Line corridors.
Portions of Calgary’s light rail system (the C-Train) operate at grade, parallel to roadways. The public has expressed concern that an upcoming expansion to the rail network will negatively impact vehicle travel times at intersections where the C-Train track and roads intersect. This study was created to quantify the effects of existing C-Train/vehicle conflicts on vehicle travel time. It utilized C-Train arrival and departure times, GPS locations of a pace car, and automated Bluetooth detectors to characterize vehicle travel times through a major intersection during peak volume hours. The combined results suggest that delays caused by conflicts with the C-Train are common, and the resulting delays are similar in duration to the delay caused by regular signal cycles.
This paper summarizes the investigation into coordinating traffic signal times along the Dunsmuir Street corridor in downtown Vancouver (Canada) for the benefit of cyclists. The objective of this paper is to show how to reduce the total waiting time for cyclists by adjusting the optimization speed of traffic lights. Major sources of data include historical traffic volume data provided by the City of Vancouver, manual collection of pedestrian counts and manual collection of bicycle counts. Bike speed data along Dunsmuir Street was recorded using a microcontroller to determine average speeds along various slopes in the corridor and variation amongst users. Space time plots were used to graphically determine signal offsets that would improve bicycle progression along the corridor, based on measured bicycle speed, while mitigating impact on motor vehicles. The sum of all the bandwidth gains and losses from all streets are added to calculate the change in waiting time. Data was also used in modelling the current day transportation impact along Dunsmuir Street to motorized vehicles. The paper shows that coordinating traffic signal for bicycles can be achieved with no significant impact on delay time and level of service to vehicles. The average number of stops a cyclist encounter is reduced, as well as a reduction in the wait time at a red lights.
Various Light Rail Transit (LRT) projects are currently being constructed or planned in several jurisdictions across Canada. With many projects now in the planning stages, agencies are defining how LRT operations are governed, modelled, and evaluated. Different jurisdictions, agencies, and consultants tackle operations differently which can affect the final outputs from a technical perspective. Typically, each LRT line varies in design and operation— from street running with basic Transit Signal Priority to lines with gated operation—requiring modeling unique situations. There are innovations in modelling processes resulting in better outcomes in the planning stage by garnering more confidence in outputs such as the LRT and traffic operational models. The significance of improving outputs reliability, such as LRT run time, traffic Measures of Effectiveness (MOEs) including those for active modes, is that they set the expectation for opening day operations. Depending on the project’s funding and procurement method, the outputs can become part of Project Agreements (PAs) which govern penalties and relief events for operations during the concession period. Jurisdictions, agencies, and practitioners may develop guidelines, tools, and processes to control the quality of traffic forecasts and micro-simulation models. This would help achieve consistency between different models, such as LRT models and traffic models. The Valley Line West is a proposed extension of the Valley Line LRT project currently under construction in Edmonton. The Valley Line West is planned to be a low floor urban integrated LRT concept with many in-street running segments. The planning process involves modelling the interactions between the LRT, vehicular traffic and pedestrians to achieve a balanced approach between all modes. An extensive modelling exercise is currently underway and involves the integration of the following models: Edmonton Region Travel Model (RTM) – An EMME based macroscopic model for travel demand forecasting; City of Edmonton Dynamic Traffic Assignment (DTA) Model – A Dynameq based mesoscopic sub area model for network-wide traffic diversion impact analysis; Valley West LRT VISSIM Model – A microsimulation traffic model for detailed operational analysis; OpenTrack Model – An LRT operational modelling tool. The modelling team has developed an integrated and iterative approach whereby the various models feed into each other. This paper highlights and details of modelling approach undertaken towards meeting the goals of the project. This paper focuses on processes rather than the results. This will include an innovative in-house developed program that integrates VISSIM and OpenTrack to achieve better results for both traffic and LRT modelling.
Climate change has the potential to transcend our way of life, and a key element of that is how we get around. Increasingly severe weather events such as snowstorms, hurricanes, or flash floods, or slower processes such as rising water levels, may leave our highways underwater, our transportation hubs isolated, and our rail lines blocked. Under these conditions, the ability of the overall transportation network to continue to allow emergency responders to act and people to evacuate will be placed under a severe strain. At this point, a transportation network unable to cope with the conditions may result in mobility chaos at best and disaster at worst, making it critical to incorporate resilience testing into future network planning. The Greater Golden Horseshoe Transportation Plan, currently under development by the Ontario Ministry of Transportation (MTO), will test network and service elements in the region under pressure to ensure proofing of transportation infrastructure in Southern Ontario against future conditions. One way in which this could be tested is by assessing the resilience of the existing network to major and recurring events using long range modelling and macroscopic forecasting tools. Using such tools we can stress-test the busiest and most critical network elements and mimic the impact of inclement weather events, or emergency situations, such as the closure of a major rail terminal or highway corridor, or the blockage of interchanges along the busiest freeways, and evaluate for each scenario how resilient the overall network is in reacting to and accommodating demand. A different application of a similar approach could be considered when planning for future road and rail infrastructure in an attempt to act pre-emptively and offset the impact of climate change. Certain locations, such as floodplains, areas susceptible to blowing snow, and urban heat islands, inherently place more stress on infrastructure, and pose higher risks to people and goods travelling through them. Using macroscopic forecasting models and GIS tools we can identify the demand that a potential corridor would generate and compare the extent of infrastructure or the demand in terms of people, vehicles, and value of goods that would use the risk-prone corridors. This approach could help us identify “safer” routes, corridors and infrastructure elements in order to build resilient transportation networks.
Les panneaux d’affichage dynamique de la vitesse sont utilisés dans plusieurs provinces et territoires du Canada. Ils permettent aux conducteurs de voir leur vitesse, habituellement affichée à côté du panneau indiquant la limite de vitesse permise. Ces dispositifs sont destinés à faire prendre conscience aux conducteurs des limites de vitesse en affichant en temps réel la vitesse à laquelle ils conduisent leur véhicule. On a pu constater qu’ils sont efficaces peu de temps après leur installation. Les Lignes directrices pour l’utilisation des panneaux d’affichage de la vitesse ont été mises au point afin de définir les meilleures pratiques et de fournir des recommandations pour la conception et l’utilisation de panneaux d’affichage de la vitesse dans le contexte canadien pour diverses situations. Ces Lignes directrices permettent et favorisent l’uniformité dans l’utilisation des dispositifs dans tout le Canada; elles ont été rédigées dans le but de servir de document de référence détaillé complémentaire à utiliser conjointement avec le Manuel canadien de la signalisation routière (MCSR).
Les murs de soutènement de sol stabilisé mécaniquement (MSSM) sont depuis longtemps utilisés comme murs de soutènement, mais il n’est pas toujours évident de déterminer qui est l’ultime responsable de la conception, de l’assurance de la qualité, de la gestion des actifs et de la réparation des murs, ainsi que de la surveillance en service des murs déjà construits, en particulier en cas de problèmes importants relativement à la construction ou la tenue en service. Le présent guide offre aux maîtres d’ouvrages, ingénieurs, fournisseurs et entrepreneurs des MSSM des lignes directrices pratiques en matière de sélection, de conception, de construction et d’inspection de ces ouvrages, surtout dans le cadre de projets de travaux publics. Le guide a été élaboré sur la base de l’examen de la littérature existante, complétée par de l’information transmise par divers intervenants dans ce domaine. Il ne cherche pas à reproduire les très nombreuses lignes directrices de conception déjà publiées, ni l’information connexe. Il vise plutôt à mettre en évidence les diverses facettes de l’état actuel de la pratique au Canada et à proposer des modifications à la pratique actuelle afin de corriger certaines lacunes.
This manual has been developed to assist bridge owners by establishing inspection procedures and evaluation practices that meet the National Bridge Inspection Standards (NBIS). The manual has been divided into eight sections, with each section representing a distinct phase of an overall bridge inspection and evaluation program. This edition updates Sections 3: Bridge Management Systems; 4: Inspection; 6: Load Rating; and 7: Fatigue Evaluation of Steel Bridges.
Le Code de bonne pratique pour les revêtements modulaires en pierre naturelle constitue un ouvrage de référence pour la sélection des matériaux (tant des éléments en pierre naturelle, que des matériaux de jointoiement et de couche de pose), la conception et le dimensionnement de projets, la mise en oeuvre et l’entretien des voiries en pierre naturelle. La fabrication d’un élément en pierre naturelle trouvant tout d’abord son origine dans des processus qui datent parfois de plusieurs centaines de millions d’années, une introduction du document consacrée à la géologie trouve tout son sens, d’autant plus que l’aspect et les caractéristiques de la pierre y sont fortement liés. Ce document tient compte de l’évolution des techniques de pose et de mise en oeuvre que l’on a pu observer ces dernières décennies suite à la mise sur le marché de matériaux moins traditionnels. Le code de bonne pratique se veut un document technique de base pour toute personne impliquée dans un projet d’aménagement en pierre naturelle. Il s’adresse aux concepteurs, architectes, entrepreneurs, gestionnaires publics ou privés, ou fournisseurs de matériaux.
Le présent document tente de rencontrer deux objectifs principaux. D’une part, établir une synthèse des connaissances et pratiques à propos des chantiers de nuit en Belgique et à l’étranger et, d’autre part, analyser les avantages et inconvénients du travail de nuit au regard de divers paramètres tels que le trafic (congestion, sécurité) et les travaux (qualité, productivité, conduite des travaux), ainsi que les paramètres sociaux (santé des travailleurs, état des conducteurs), économiques (coût des travaux, coûts indirects aux usagers, etc.) et environnementaux (pollution lumineuse, bruit, etc.). Sur base des références analysées et de l’information reçue, les principaux éléments décisionnels qui orientent le choix du mode d’exploitation d’un chantier routier, y compris le recours au travail de nuit, sont la minimisation des facteurs de gêne (fluidité du trafic) et le maintien d’un niveau acceptable de sécurité sur le tronçon considéré. En particulier, du point de vue de la limitation de l’impact sur le trafic, il s’agit de planifier des travaux de sorte à réduire l’ampleur et la durée de la gêne occasionnée (sans oublier de tenir compte de l’éventuel report de trafic, organisé ou pas, sur d’autres routes). Concrètement, il s’agira, sur base du trafic existant et en fonction de la période à laquelle se déroule le chantier, de conserver un nombre suffisant de voies de circulation afin de maintenir un niveau de service acceptable. Pour ce faire, on recourt souvent à une classification des sections du réseau routier selon leur sensibilité aux restrictions temporaires et partielles de la circulation. Dans ce contexte, le recours au travail de nuit ou en dehors des heures habituelles de travail apparaît comme une option qui s’envisage dès lors que d’autres mesures s’avèrent insuffisantes ou impossibles à mettre en oeuvre: utilisation de la bande d’arrêt d’urgence, réduction temporaire de la largeur des voies, mise en place d’une déviation, exécution des travaux en journée mais en dehors des heures de pointe, le tout selon le type de travaux considéré. Les critiques à propos des chantiers de nuit et leurs nombreux inconvénients sont fréquentes. Cependant, lorsqu’on examine attentivement l’ensemble des facteurs, la différence entre la construction de jour et de nuit n’est pas significative, ni en termes de coût, ni en termes de productivité, de qualité ou de sécurité. Bien entendu, un bon éclairage et un meilleur contrôle de la circulation sont nécessaires, mais surtout, une bonne planification peut atténuer ou limiter l’impact de tous les facteurs moins avantageux de la construction nocturne. De nombreuses stratégies visant à atténuer les risques doivent être considérées au moment de la prise de décision de réaliser les travaux de nuit, de sorte que le processus d’analyse des risques doit commencer dès les premières étapes du développement du projet.
In Canada, the total length of the winter road network is estimated at 10,000 km. These are roads that are usable only in the winter. Nature controls the state of a winter road’s foundation – natural ground and ice surfaces – which needs to be trafficable and able to support the vehicles’ weight. These surfaces are particularly sensitive to climate change. A large number of adaptation measures were developed over the years, which can be applied at the planning, construction and maintenance stages, and for traffic management. We have reached a stage where increasing our fundamental knowledge base is required. This can be done through research and development (R&D). Avenues of investigation include a field tool to characterize winter roads in a more systematic fashion, by combining physical information (e.g. road grades, cross-slopes, width, over-land vs over-water ratio) with all operational and logistical data (e.g. opening and closure dates, nature of goods transported) into an interactive database. This could be used for capacity and multimodal planning, as well as to guide priorities on road realignment and incremental replacement (partial or complete) by all-weather road segments. Several outstanding questions regarding the bearing capacity and deformational behavior of floating ice roads could also be addressed. Topics that need to be investigated include: ice cover strength, how long a vehicle can be parked on the ice, how cracking patterns affect ice integrity, and the investigation of known procedures, techniques and technologies to reinforce an ice cover.
In the City of London, the total number of collisions has declined between 2008 and 2011, from nearly 8,400 to less than 7,500. However, the number of injury collisions increased from approximately 1,400 to over 1,500 in the same period. Following a worldwide trend of agencies focusing efforts on reducing the number and severity of motor vehicle collisions, in 2014 the City of London (the City) developed a Road Safety Strategy to reduce fatal and injury collisions. In 2017, the City adopted the Vision Zero principles, based on which no loss of life is acceptable, making London one of the early Canadian adopters of Vision Zero. One of the key elements of the London Road Safety Strategy (LRSS) during the development of the plan, which occurred between 2012 and 2014, was the coalition building effort, which brought together a multidisciplinary team, including engineering, enforcement, public health, and advocacy groups, among others. This multidisciplinary team expanded the previously active London Middlesex Road Safety Committee into a Steering Committee formed by the City of London, Middlesex County, Ministry of Transportation Ontario, London Police Service, Ontario Provincial Police, Canadian Automobile Association, Young Drivers of Canada, London Block Parent Program, London Health Sciences Centre, Middlesex-London Health Unit.
Manitobans are cycling and walking on provincial highways, and this is not always safe. While active transportation (AT) on highways presents multifaceted safety concerns, it is legal to walk or cycle on all provincial highways in Manitoba. Highway rights-of-way may be the only available public corridors that connect people to where they want to go. Highways are not conventionally designed for AT purposes. Nevertheless, highway operators have a role to play in ensuring the safety of all highway users and enhancing the wellbeing of citizens. It is with this lens that Manitoba Infrastructure developed the AT Policy and Planning Guide to respond to the following questions: How can a highway operator cost-effectively account for AT safety? Under what circumstances should a highway operator consider AT? What are appropriate AT investments for a highway operator? The outcome of the policy and planning guide development process was to outline the role of Manitoba Infrastructure in addressing AT on provincial highways, and to guide Manitoba Infrastructure’s decision-making process when considering AT users and AT needs, in relation to the provincial highway network. The following summarizes the policy: Local governments and/or trail organizations are primarily responsible for the ownership and maintenance of local AT facilities, which includes design, construction, operation, maintenance, funding, liability, and stewardship. MI maintains on-highway AT-related facilities, in order to protect highway safety and operations. Public transportation, including AT, is an appropriate use of provincial highway rights-of-way, if facilities are appropriately located. MI will work with local governments and trail developers to ensure that AT facilities are well planned and designed to protect highway safety and operations. Where there is significant demand for AT on provincial highways, as interregional and/or interprovincial corridors and connections, MI has a responsibility to: reasonably improve safety and usability partner with local governments and/or trail organizations to facilitate development of AT facilities The resulting planning guide presents a three step approach to considering AT, where Manitoba Infrastructure: 1) reviews if there is AT activity at a location, based on an AT trigger map; 2) prioritizes AT activity, given current and latent demands; and 3) determines the appropriate investment. As a further component of the AT Policy and Planning Guide, Manitoba Infrastructure is publishing maps to inform the public about the AT safety implications of various provincial highways.
In 2017, the Ontario Ministry of Transportation (ministry) successfully completed the replacement of the Highway 3 Grand River Bridge at Cayuga, Ontario. The existing bridge constructed in 1924 was a five span, 188m long, steel through truss bridge. This complex project included a number of “firsts” for the ministry. This was the first project in Ontario that was delivered using the Construction Manager General Contractor (CMGC) contract delivery model. The project also included a number of innovative solutions, such as slide-in bridge construction of a 188m five span structure, through collaboration with the contractor during the design phase. The CMGC model is still a relatively new contract delivery model for the ministry. The intent of CMGC is to form a collaborative team, between the owner, designer and a contractor, which begins in the design phase and continues throughout construction. During the design phase the contractor provides construction expertise and constructability input into the design with the intent to become the general contractor. This paper provides an overview of the CMGC delivery model, and discusses the rationale for selecting the CMGC contract delivery model for the bridge replacement project in Cayuga. The paper also describes technical solutions developed and implemented by the collaborative CMGC team during both the design and construction phases of the project. Some of the design challenges of the project included the need to construct the replacement bridge while maintaining two-way traffic on the existing bridge; geotechnical challenges related to fractured voided bedrock; the need to maintain existing utility lines across the bridge during the bridge demolition and bridge slide operations; and the need to minimize impacts to the bed and banks of the river. Furthermore, adding to the complexity of the project, during construction, work was stopped for a period of 17 months while the new bridge was sitting on temporary supports and the existing bridge had already been demolished. The CMGC approach again played an important role, enabling the ministry to effectively manage this unforeseen delay through the collaborative relationship developed with the ministry, designer and contractor. Following the successes achieved on this complex project, the ministry has extended the use of the CMGC delivery model to a number of other complex projects.