What is a road restraint system (RRS)? 


A Road Restraint System is a safety product, which aims at reducing the consequences of accidents of an errant vehicle.


Road restraint systems can be divided in:


Road safety barriers – the road barriers are placed along the roadside or on the central reserve; their role is to prevent errant vehicles from crashing on roadside obstacles, and to retain them safely.


Crash cushions – the crash cushions are collapsible structures that prevent vehicles (usually cars) from impacting specific hazardous sections (eg: the beginning of the central reserve). They safely stop the vehicle, avoiding worse consequences.


Terminals for road safety barriers – Terminals are the ending part of a safety barrier; their role is to avoid those parts from becoming dangerous points for vehicles.


Motorcycles protections systems – MPS represent an integrated system or an upgrade which, if applied on a road safety barrier, can reduce the consequence of impact for a motorcyclist after falling.


Transition between 2 safety barriers – Transitions are products which connect two safety barriers, guaranteeing structural continuity and a correct passage from the performance of the first barrier to the following one without creating black spots in those critical points


Each of those products have to comply with several safety requirements, which takes into account the safety of the occupant involved in the crash as well the safety of   incoming traffic, both on the same lane and on the opposite one, depending on their location (lateral/central).


To assess those requirements, crash tests must be performed on each of those products (2 to 6, depending on the type of product); they aim at recreating ideal situations representative of the worst possible real-case that may happen in real-life, considering the “state-of-the-art” of crash-testing technology, the repeatability of the tests and, of course, the need to assess reliable safety features.