Although the Korea government promotes the movement of safe traffic to reduce deaths in traffic accidents, the number increases every year.

Especially more and more accidents and casualties are reported from the cases of car collision to the back of the vehicles parked for managing car accident on road, cleaning of main roads, side roads and medial strip, and road repair.

Therefore, it has been along that the government should be responsible for taking a protective measure for road users. 71 cases

have been reported to occur during highway repair and maintenance. As the result, 8 were dead and 76 were injured, showing the death rate of 11.3%, which is quite high.

So it seems urgent to take some action against it.

America and European countries legislate that vehicles of road repair and maintenance should be mandatorily equipped with shock absorber on car but our country lacks in a legislative measure, which is asked to be done.

Accordingly, this study compares the performance standards of shock absorber for road maintenance vehicle by applying country to establish the criteria.

In addition, it tries to interpret in theory the Rear Safety Guard using Air Bag and compare the safety performance test of a vehicle with the Rear Safety Guard manufactured in accordance with related laws and that using Air Bag.

Based on the result of the safety performance on the 60km/h Rear collision Test, this study proposes improvement in related regulations and laws in an attempt to reduce collision and death by proposing the Traffic Injury Prevention effect of the Rear Safety Guard using Air Bag.