From Highways England:
'This Traffic Modelling Report for Consultation gives an overview of the work carried out by Highways England to assess the need for, and impact of, the A12 Chelmsford to A120 widening scheme. It presents the key findings of the differences in the performance of the road network in the future if the proposed scheme is built or not.
We have assessed the need for additional road capacity on this section of the A12, and the impact that widening the road would have, by developing a simulation of the transport system in the north Essex area. This is referred to in this report as the ‘traffic model’.
The traffic model shows the number of people travelling by road and the routes they use now, and the routes they are forecast to use in future. This enables us to predict how many vehicles will be using each part of the road network in the future and how long it would take to complete a journey. This helps to inform the design of the proposed scheme and to predict its environmental impacts. This report describes how we developed the traffic model and summarises its key findings.'