It is well known that the start/end of a road safety barrier is the most hazardous part of the system. The main risks involve spearing of the errant vehicle or an abrupt stop beyond bio-mechanically survivable thresholds. While a ramp down end terminal removes the spearing risk, it creates a new risk of vehicles vaulting. 

Here are some end terminals that we recommend you check out (note: always check your jurisdiction’s list of accepted safety barrier products):