Abstract
Glasgow's second generation Urban Traffic Control (UTC) System, CITRAC (Centrally Integrated Traffic Control) was commissioned in 1984 and uses the fixed time TRANSYT Control Strategy. The system was substantially modified in 1994 when the original mini computers were replaced with modern PC File Servers and Windows® Graphical User Interface terminals. The System currently controls over 550 traffic and pedestrian signal controllers in 6 Local Authority areas including the City of Glasgow. Under the Scottish Executive's Public Transport Fund, Glasgow City Council have been successful in obtaining finance for the installation of a Public Transport Information and Control System along eight quality bus corridors within the Glasgow Conurbation. The Computerised Bus Information and Signalling (BIAS) System will provide signal priority at traffic signals along the corridors, tracking buses using a Global Positioning System (GPS). Information will then be supplied to the travelling public to encourage the Modal Shift towards public transport.
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