The TPB's CLRP Aspirations Scenario Study integrated far-reaching land-use and transportation alternatives into one synergistic system. The study looked at the effect of implementing a 1,650-mile regional network of toll lanes (including new lanes and conversion of existing lanes, a region-wide 500-mile system of high-quality bus service, and changes in land-use policies to promote denser, transit–oriented development. The scenario has the acronym “CLRP” in the title because it was designed to provide potential inputs for the TPB’s Constrained Long-Range Plan. The land-use and transportation components of the study were largely based on findings from previous scenario analyses – the Regional Mobility and Accessibility Study (2006) and the Regional Value Pricing Study (2008).
Key Documents and Presentations
Preliminary analysis of an update to the CLRP Aspirations Scenario Study will be presented to the TPB. This update includes new baseline planning assumptions (2012 CLRP, Round 8.1 Cooperative Forecast, Horizon Year 2040), modeling tools (TPB Version 2.3 Travel Forecasting Model, EPA's MOVES emissions model), and changes to the variably priced lane network to account for the recently enacted MAP-21 legislation.
The findings of the CLRP Aspirations Scenario Study were presented at the 92nd Annual Meeting of the Transportation Research Board in Washington, D.C. In addition to presenting the results, the paper compares the CLRP Aspirations Scenario Study to the recommendations outlined in the MAP-21 legislation for scenario development and analysis to evaluate how well the current TPB scenario planning process aligns with the new legislation and how the process can be improved in the future.
Analysis from an additional sensitivity test, the "Streamlined VPL Sensitivity Test" was presented to the TPB. This additional sensitivity test was conducted to response to concerns about the high cost of the VPL Network in the original CLRP Aspirations Scenario.
The "final" report on the CLRP Aspirations Scenario Study was presented to the TPB. This report contained analysis of the CLRP Aspirations Scenario as well as a sensitivity test which examined the impact of the land use changes alone.