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...
12.10 Arrow-Per-Lane Sign Design to Support Driver Navigation An arrow-per-lane sign is an overhead sign with two components: (a) arrows that point to individual lanes and (b) destination information positioned immediately above the arrows. Motorists use information...
12.8 Driver Information Needs at Complex Interchanges Design interchanges so they conform with motorist expectations. Violating expectations increases the amount of time a motorist requires to execute a task as well as the number of errors. Table 12.3 lists design...
12.12 Driver Behavioral Trends Based on Exit Ramp Geometry Exit ramps need to afford vehicles enough space to depart the main freeway lanes and enough distance to decelerate to a speed appropriate for the controlling feature of the ramp. Several design practices...
12.6 Driver Expectations at Freeway Lane Drops and Lane Reductions Because lane drops can confuse motorist, increase variability in speed, and result in erratic driving behaviors, designs need to match motorist expectations. Table 12.2 lists design practices that...
12.4 Reducing Wrong-Way Entries onto Freeway Exit Ramps Wrong-way incidents originate most often at exit ramps. They are also common in areas with low traffic volumes and light land use. Elderly motorists are more likely to be involved in wrong-way crashes than...
