This paper describes how information was collected on goods movements in Swindon and a computer model built to predict some of the likely effects of controls on goods vehicles. There were two main surveys: a survey of goods vehicle movements in the town and a survey of the attitudes of vehicle operators to discover how they would modify their operations if faced with particular control measures. Vehicle journeys that would be affected by a control are identified by the computer model, which then replaces them by others which would comply with the control. The choice of a replacement journey is made using one of three alternative 'option selection methods', two based on the results of the operator attitude survey and the third variable at the discretion of the user. From the changes in vehicle journeys, changes in traffic flows and journey costs are calculated. (author/publisher) for covering abstract of this seminar see IRRD no. 229391.
Samenvatting