In 1980 'Youngline' takes a look at the technology behind how traffic lights work.
Explaining how traffic lights are used to control traffic flows and facilitate pedestrians.
An induction loop system on most roads acts as a metal detector which sends a signal to a traffic control box. Radar systems are also being tested to detect traffic and pedestrians. The signals are processed by a control box where a request is made for the lights to change colour.
A 'Youngline' report broadcast on 21 January 1980. The reporter is Conor McAnally.
Traffic Light Controls