TAC Research Bulletin

An increasing number of Accessible Pedestrian Signals (APS) have been installed at new or upgraded intersections to assist people with vision impairment to navigate streets. For un-signalized intersections and intersections without APS, people with vision impairment have to rely on their own orientation and mobility skills to gather necessary information to...

Non-exhaust emissions of particulate matter constitute a little-known but rising share of emissions from road traffic and have significant negative impacts on public health. This report synthesizes the current state of knowledge about the nature, causes, and consequences of non-exhaust particulate emissions. It also projects how particulate matter emissions...

With the increasing availability of portable and low-cost automatic sensors that can be mounted on vehicles, this project was designed to investigate the potential of obtaining traffic data from sensors on municipal vehicles operating in the traffic streams as “mobile sensing platforms.” The public nature of municipal vehicle fleets would facilitate...

The purpose of this report is to provide clarity around the design and operation of raised safety platforms and deepen understanding of leading international practice across a range of applications and performance dimensions. A review of literature and sample site investigations have found that a community of practice around raised safety platforms at...

Despite recent developments, the measurement of actual pavement surface deflections under the axles of a moving truck at a network level remains a challenge in pavement engineering. Several pieces of equipment have been developed in the past decade but they fail to accurately measure actual deflection. Most of them measure indicators of deflection or deflection...