Measuring Usefulness of Crash Fact Signs on Speeding Behavior: A Case Study from Sahrawi Highway

New technology that has the ability to reduce speed and hence improve safety has attracted researcher’s interest. To mitigate speeding behaviour on the Jordanian Sahrawi highway, a driving simulation study will be used to investigate potential countermeasures. Dynamic Warning Crash Fact Sign (DWCFS) will be proposed and its effectiveness will be examined on Sahrawi highway. To determine the effect of (DWCFS) on speeding behaviour, a driving simulator will be used to create a set of scenarios that allow changing driver speed behaviour. The scenarios are designed to simulate driving through a section of Sahrawi highway with high speed while interacting with (DWCFS), and create an environment that speed altering could happen. 60 participants will be asked to drive several experimental scenarios subdivided into four areas for data collection. The two experimental scenarios will include dynamic signs as follows: (1) ‘10 INJURIES OVER 2 YEARS SLOW DONWN SPEED KILLS’, and (2) ‘OVER 10 PEOPLE WERE KILLED LAST YEAR IN THIS ROAD’. The dynamic sign will be placed at different locations including the beginning of the residential area with an 80 km/h speed limit, and an uninterrupted section with 110 km/h. Comparison of the measures of effectiveness (speed, lane position, acceleration, deceleration, and gap) will be made to assess speed limit compliance and changes in driver behaviour. The DWCFS will expect to reduce the average speed, 85th percentage speed, and the percentage of vehicles exceeding the speed limit on Sahrawi highway.