TRANSYT (TRAffic Network StudY Tool) is traffic engineering software developed by the Transport Research Laboratory.
[2] The user inputs saturation flows and observed traffic flows on the relevant highway links which are controlled by signals.
The software was developed in the UK and the first version was released in 1967.
[3] It has been adapted for use in other countries, including Chile, where TRANSYT 8S was used from the late 1980s to improve traffic flow in the capital, Santiago.
[4] In the US, the Federal Highway Administration adapted the product into TRANSYT-7F.