The TMfS:07 Road Network is based on the Ordnance Survey (OS) MasterMap Integrated Transport Network (ITN) GIS data. This platform provides a geographically accurate representation of Scotland’s road network which, in turn, allows the Road Model outputs to be used directly for noise and air quality analyses.

The Road Network includes all Scottish Motorways and A-Roads, a few strategically-important Scottish B-Roads (for instance in the Central Belt, Scottish Borders and Aberdeenshire), a small number of strategically-important minor roads, and a ‘skeletal’ representation of the road network in England and Wales.

There is no explicit junction modelling undertaken in the TMfS:07 National Road Model. The congestion effects of traffic flow on a road link and / or junction delay at the end of a road link are included in the link-based flow delay relationships. These relationships take as input the volume / capacity ratio for the road link.

To view maps of the road network, please follow the link to the maps page.