Vehicle audio control method, vehicle audio device and vehicle
Vehicle power mode adjusting method, device and system
Highway road condition monitoring and early warning device
Green channel vehicle inspection data recording device
ETC parking fee automatic payment method and ETC device
Expressway ETC lane toll collection device and use method thereof
Real-time monitoring system and method for running speed of vehicles on highway
ETC parking online transaction system compatible with license identification equipment
ETC (Electronic Toll Collection) equipment and use method thereof
Information playing method and device for ETC partner, storage medium and electronic equipment