{{Short description|Traffic engineering software}} thumb|300px|Signalised roundabouts can be modelled using TRANSYT.
'''TRANSYT''' (TRAffic Network StudY Tool) is traffic engineering software developed by the Transport Research Laboratory.<ref>TfL Traffic Modelling Guidelines v3 http://content.tfl.gov.uk/traffic-modelling-guidelines.pdf</ref> It is used to model signalised highway networks and has the ability to model platooning.
The current release is version 16.<ref>TRL https://trlsoftware.com/2019/05/22/transyt-16-now-available/</ref>
==Method== The user inputs saturation flows and observed traffic flows on the relevant highway links which are controlled by signals. TRANSYT then optimises the green time for each signal to minimise the overall number of stops and delay time.
==Worldwide use== The software was developed in the UK and the first version was released in 1967.<ref>Transyt 16 User Guide, page 24.</ref> 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.<ref>Evolution of the TRANSYT model in a developing country DOI: 10.1016/j.tra.2005.08.008</ref>
In the US, the Federal Highway Administration adapted the product into TRANSYT-7F.<ref>University of Florida https://mctrans.ce.ufl.edu/mct/index.php/hcs/transyt-7f/</ref>
==Other software== TRANSYT's main competitor is LINSIG.
==References== {{reflist}}
Category:1967 establishments in the United Kingdom Category:1967 software Category:Traffic simulation Category:Transport software