A GIS Tool for Urban Road Safety Analysis
C Carvalheira, High Institute of Engineering of Lisbon, PT; L de Picado Santos, Technical University of Lisbon, PT
Comprehended in IRUMS - "Safer urban roads", a new tool was developed proposing to improve the identification of hazardous urban sites and also to create a procedure for selecting efficient infrastructure corrective safety measures.
Comprehended in IRUMS - "Safer urban roads", a project co-financed by the Foundation for Science and Technology, carried out by the National Laboratory of Civil Engineering and the Department of Civil Engineering of the University of Coimbra, with the cooperation of the Lisbon Municipality and the Portuguese Police and finished in 2010, was aimed to develop a procedure for the explicit consideration of safety issues in the decision making process of urban transportation networks and in the allocation of resources for physical network renewal.
A new tool was developed proposing to improve the identification of hazardous urban sites and also to create a procedure for selecting efficient infrastructure corrective safety measures. Using the Lisbon road network, five year road accident records, data on road infrastructure characteristics and traffic and land use information were collected and managed by a Geographic Information System, where this new analysis tool is integrated. Aiming to be a full decision making tool, for each analysed site or area it is possible to impute low cost countermeasures that are expected to be possible and effective to implement. To decide about these implementations, a model to define corrective hierarchy measures is being associated to this tool.
The paper describes the new tool and the aid-decision model for corrective measures, underlying the main features and constrains to their application. A case-study implementation and what will be necessary to achieve a full decision making tool is presented, defined crossroads are analysed with this new tool, identifying accident typology and possible road corrective measures assigned to these places.
Association for European Transport