End Terminals and Crash Cushions

The latest additions to the range of products supplied and installed by HBS are Crash Cushions and P4 Terminals. These systems are used in place of P1 Terminals which are now only suitable for roads with speed limits under 50mph and departure ends (on dual carriageways and motorways) with speed limits 50mph and above.

P1 End terminals are the traditional ramped down type systems.

P4 End terminals are energy absorbing devices used with the WireRope, Flex Beam systems or traditional OBB, TCB systems.

Crash cushions are devices that absorb energy at a controlled rate, thereby preventing errant vehicles from impacting fixed and rigid
unprotected objects or structures. This is achieved by gradually decelerating a vehicle to a safe stop for head-on impacts or, in side impacts, by redirecting the errant vehicle away from the obstruction along the length of the system in a similar manner to that of a safety
barrier. A crash cushion designed only to contain impacts on the front of the device is known as ‘non-redirecting’ and one that allows both end-on and side impacts is a ‘redirecting’ cushion.

Terminal Specification

Performance Class
Impact Severity Level (ISL)
Permanent Lateral Displacement Zone (PLDZ)
characteristic
Exit Box Class

Crash Cushion Specification

Performance Level – this must indicate whether a redirective or non-redirective crash cushion is required
Impact Severity Level (ISL)
Redirection Zone Class
Permanent Lateral Displacement Zone Class

P4 Energy Absorbing Wire Rope End Terminal Detail