The application of advanced information processing, communications, remote sensing, and control technologies to the field of transportation engineering is known as Intelligent Transportation Systems (ITS). The Pennsylvania Department ofTransportation has embarked on an ambitious ITS program known as the "Traffic and Incident Management System" (TIMS) for the Philadelphia area. The goals of the Philadelphia TIMS are to alleviate congestion, to improve safety, and to enhance overallmobility. The TIMS philosophy essentially revolves round the "freeway management" concept. Few of the important features include real-time monitoring of traffic flow, detecting incidents (including accidents) and responding to them through coordinatedactions of all involved agencies and jurisdictions.TIMS is predominantly made up of components that require better information about the vehicle and the driving environment and to establish effective vehicle-roadway interaction. In order to develop technologies to serve the systems in safety relatedcomponents, a statistical inventory and an understanding of highway accident parameters is required.This paper statistically analyzes 2246 serious accidents over the five-year period 1991-95 on Interstate 95 (I-95). A twenty-two (22) mile section of the interstate freeway I-95 in Philadelphia County, Pennsylvania with termini at the borders withDelaware County and Bucks County is considered for this purpose. This section of the freeway comes under the direct jurisdiction of the Pennsylvania Department of Transportation, District 6-0 that is headquartered at St. Davids, PA. The freeway traversesthrough the city of Philadelphia and experiences an average daily traffic of more than 75,000 vehicles per day. The accidents are analyzed by the following nine (9) categories: 1. By type of weather 2. By surface type 3. By hour of the day 4. By type of lighting 5. By day of the week 6. By month of the year 7. By type of collision 8. By accident severity 9. By 12 probable factors
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