Speed measurement warning device suitable for downhill road section of expressway
The vehicle access blocking device and road blocking method using the same
Artificial elimination method for road surface heating agglomerate fog
height limit device and the method install height limit device
Real-time school zone smart safety lights system using piezoelectric sensors and infrared sensors
Highway traffic flow early warning control device and early warning control system
CO2 MANAGEMENT SYSTEM, CO2 MANAGEMENT METHOD, AND STORAGE MEDIUM
Black ice accident prevention system using reversible discoloration paint
Road black ice warning sign displayed on the road surface