New illuminated signs give instructions to drivers on the M4 motorway.
No titles. Computerised control system for M4.
Various point of view shots taken from a car as we drive along the M4 (motorway). By the side of the road and on gantries we see several shots of the new illuminated signs that give drivers instructions to reduce speed, or tell them a lane is closed ahead. M/S of a man driving our car.
In the police control room at Heston we see Robert Brown, Joint Parliamentary Secretary to the Ministry of Transport, watching police officers sitting at control boards and watching the motorway traffic on closed circuit television screens (CCTV). Shot of CCTV camera mounted on a pole beside the M4. Shots of traffic travelling along the motorway. More shots of the illuminated signs from a gantry as cars pass below.