13.8 Changeable Message Signs The purpose of changeable message signs is to communicate important messages succinctly. Keep display messages to a maximum of two phases. Avoid splitting information across phases, use a consistent format for calendar dates, and make...
13.2 Overview of Work Zone Crashes Young male motorists (ages 25 – 34) are most likely to be involved in work zone crashes. Knowledge of work zones and how they influence safety is valuable for reducing crash risk. Table 13.1 provides general guidance on structuring...
11.8 Countermeasures for Improving Accessibility for Vision-Impaired Pedestrians at Signalized Intersections Several design strategies can be used to improve accessibility for vision-impaired pedestrians at signalized intersections: Avoid the use of large-radius...
11.4 Restricting Right Turns on Red to Address Pedestrian Safety The Manual on Uniform Traffic Control Devices lists three pedestrian-related situations in which right turns on red (RTOR) should be restricted, including where: An exclusive pedestrian phase exists...
11.2 Engineering Countermeasures to Reduce Red Light Running Factors that influence the likelihood of drivers running red lights include traffic volume, cycle length, advance detections for green extension, speed, signal coordination, yellow interval duration,...
10.10 Sight Distance at Right-Skewed Intersections When a vehicle crosses a major road from a right-skewed minor road, the motorist has an unobstructed line of sight over their left shoulder. But some drivers may not be able to turn their bodies to take advantage of...
