name = TRANSYT
developer =Transport Research Laboratory
latest_release_version = 13.0.3
latest_release_date = October 2008
operating_system = Windows (2000, XP or Vista)
genre = Traffic Software
Software license agreement
website = [http://www.trlsoftware.co.uk/TRANSYT http://www.trlsoftware.co.uk/TRANSYT]
TRANSYT is a piece of software developed in the UK by the Transport Research Laboratory. It is used to assess and optimise the performance of networks of road junctions by assigning costs to vehicle stops and delays. This allows modelling of signalised roundabouts.
Data input in Transyt involves:
*dividing roads and lanes into "links" with shared signals and shared traffic movements;
*assigning a "
saturation flow" to each link, indicating the maximum flow of traffic over the stop line during the green time;
*entering the signal timings that apply to each link.
For each link:
*the maximum capacity;
*the "degree of saturation";
*the maximum queue length during the cycle.
*animated uniform queues;
*a performance index that indicates the cost of the stopages and delays on that link
*fuel consumption for that link;
For the network overall:
* total distance travelled;
* mean journey speed;
* a performance index that indicates the cost of the stopages and delays within the network.
TRANSYT can also optimise signal timings over the network to find the combination with the lowest "Performance Index". It does this using a hill climb algorithm.
TRANSYT 13 features an improved user interface over the previous version. TRANSYT 13 also includes modelling of blocking back, which is useful for signalised roundabouts. This is performed using a Cell Transmission Model.
* [http://www.trl.co.uk/ Transport Research Laboratory]
TRANSYT Product Page: [http://www.trlsoftware.co.uk/products/detail.asp?aid=4&c=2&pid=66]
Wikimedia Foundation. 2010.