Resource Allocation Process / South Dakota DOT
SDDOT’s agency mission is “to efficiently provide a safe and effective public transportation system.” To support this high-level goal the agency sets ten-year objectives for its pavements and bridges, as well as a minimum acceptable condition for pavements. For pavements SDDOT summarizes conditions using Surface Condition Index (SCI), a composite measure represented on a scale from 0 (worst condition) to 5 (best conditions) that incorporates measures of roughness, rutting, faulting and distress indices. For bridges, SDDOT summarizes conditions based on the percentage of structures in good or fair condition, using the FHWA good/fair/poor measure for classifying the condition of a bridge.
To determine how to allocate capital funds for state-owned pavements and bridges SDDOT relies heavily on its pavement and bridge management systems. The agency predicts conditions for a 10-year period for a range of different budget levels, and then compares the predicted performance to the agency’s goals and objectives. The figures, reproduced from SDDOT’s 2018 TAMP, show results in terms of predicted SCI over time for five budget scenarios generated using SDDOT’s Pavement Management System (PMS), and results in terms of percent of bridges in good or fair condition for two budget scenarios generated using the agency’s Bridge Management System (BMS).
Given the projections as well as additional projections of pavement condition for six functional systems, the agency uses its Trade-Off Tool to evaluate the impact of different funding scenarios and recommends the funding distribution that will produce the greatest benefit. The final result of the analysis is a distribution of funding between asset type and functional system, as well as the distribution of funds between four types of work:
- Construction and Reconstruction
- Resurfacing and Asphalt Surface Treatment
- Rehabilitation and
- Safety
Decisions about what capital projects to perform are then made given the funding level established in the trade-off analysis.
Source: SDDOT Transportation Asset Management Plan. 2018.http://www.sddot.com/resources/reports/SDDOT2018TAMPFHWASubmittal.pdf
State Network Investment Strategies
State Network Structure Investment Strategies
Read more in the chapter: 5.1.3 Prototypical Resource Allocation Process