17.6 Effects of Roadway Factors on Speed Geometric, environmental, and traffic-related variables all influence driving speed under free-flow conditions on tangents. Drivers of free-flowing vehicles can select speeds based on their level of comfort and the appearance...
17.4 Speed Perception and Driving Speed Motorists can misperceive the speed at which they are traveling. Although speedometers indicate vehicle speed, often motorists rely on external cues (e.g., engine noise, vibrations, visual sensations elicited through highway...
17.2 Behavioral Framework for Speeding Factors related to the motorist, vehicle, road, and environment influence speeds at which motorists drive. Figure 17.1 reviews factors designers should focus on to select countermeasures that mitigate speeding. It is critical to...
15.6 Methods to Reduce Driver Speeds in School Zones Traffic control devices and pavement markings are valuable for encouraging motorists to drive at lower speeds in school zones. Table 15.2 provides operational and design guidelines for school zones. Table 15.2...
15.4 Methods to Increase Compliance at Uncontrolled Crosswalks Design treatments that improve pedestrian safety and increase compliance with crossing requirements include: Installing a HWAK signal beacon or a half signal Providing a maximum pedestrian delay of 30 – 60...
15.2 Methods to Increase Driver Yielding at Uncontrolled Crosswalks An uncontrolled crosswalk is in a location that lacks stop or signal control (e.g., midblock intersection). Pedestrians using marked crosswalks and drivers approaching these crosswalks require...
