The illinois interstate highway network is deteriorating at a rapid rate because of its age and heavy truck loadings. Meanwhile, thefunds required for rehabilitation far exceed the available budget. Illinois department of transportation (idot) administrators and planners are faced with many difficult questions about the consequences of adopting different pavement rehabilitation budgets and policies. To answer these questions, they need information about future rehabilitation needs and pavement conditions for different funding levels and rehabilitation strategies. The illinois pavement network rehabilitation management program (illinet) was developed to provide this capability. The program generates useful results on a personal computer in both summary tables and graphics. Performance prediction and cost models are used together with decision trees to generate severalfeasible strategies for each pavement section in the network. All strategies for all sections are then analyzed together to find answers to a variety of "what if" questions regarding network budget levels and rehabilitation policies. This paper appears in transportation research record no. 1272, Pavement management and rehabilitation 1990.
Abstract