Work zone is the area that involved with a construction activity on or within the working traffic. During this activity, a careful design work zone control by a certified traffic consultant is compulsory. It is important to remember that whenever work is done on or near the roadway, drivers are faced with unexpected traffic conditions. Work zone on the highway system interrupt regular traffic flows and create safety problems. These changes may be hazardous for drivers, workers, and pedestrians. The study objectives are to examined speed characteristics and driver compliance with the temporary posted speed limit approaching work zones at the expressway. Speed for passenger car, motorcycles and heavy vehicles were collected at different traffic control zone which are divided into Advance Warning Area 1 (AWA 1), Advance Warning Area 2 (AWA 2) and Work Area (WA). Statistical analysis using t-test and chi- square test to determine the relationship of compliance to the speed limit with respect to factors such as location, traffic control zone and displayed temporary posted speed limit were performed. Higher mean and 85th percentile speeds compared to the temporary posted speed limit are observed at all study locations. The different of mean speed is statistically significant which more than 60% of road user travelled higher than the speed limit, especially at the AWA 2 and WA. Passenger cars and motorcycles recorded the highest non-compliance rate compared to the heavy vehicle that need to slow down due to their large dimension in order to merge with other traffic thus contribute to the high speed compliancy rate especially at that AWA 2. By displaying temporary speed limit lower than 60 km/h, it will exhibit a higher percentage of incompliance. It reflects that the speed management through the use of static speed limit sign is less effective to slow down vehicles. Thus, the implementation of alternative methods such as Variable Advisory Speed Limit, Dynamic Message Signs, Speed Monitor Display, Emergency Flasher Traffic Control Device and other available technology can be considered as research have proved it have significant effect to
reduce speed at works zones.