I-66 Multimodal Study Final Report - Virginia Department of ...

Multimodal PackagesImproved network operations resulting in travel time savings, increased system reliabilityand overall emissions reductions;Safer conditions, including quicker emergency response;Reducing queuing and delays during incidents by rerouting highway traffic;Providing multimodal options by dissemination of timely information (improving parkand-rideaccess, for example) and potentially utilizing unused capacity; andImproving reliability and quality of ride by prioritizing transit.The I-66 corridor has existing infrastructure which can be used for both the ATM and ICMstrategies, including CCTV’s, detectors, and fiber-optic cable along the corridor. A preliminarycost estimate which includes the upgrade and purchase of hardware and software, for proposedATM infrastructure inside the Beltway along I-66, is approximately $300,000 per mile(approximately 10 miles in both directions). The annual operating cost is assumed to beapproximately 10 percent of the capital cost. Approximately $6 million in capital expendituresare required to implement ICM in the study area, with approximately $1 million per yearassumed in operating costs.ICM strategies were not modeled as part of the study; therefore, assessing benefits and costs ofthe ICM strategy would not be precise. There is, however, useful benefit/cost informationrelated to ICM projects from around the country that can serve as reference, to better inform thedecision-making process of this study.A significant amount of experience has been gained at the three ICM pioneer sites – U.S. 75 inDallas, Texas, I-394 in Minneapolis, Minnesota, and I-15 Corridor in San Diego, California.U.S. 75 is a north-south radial corridor that serves commuter, commercial, and regional trips,and is the primary connector from downtown Dallas to the cities to the north. The I-394 corridorstretching from the Minneapolis central business district to the Hennepin County line withTrunk Highway (TH) 55 to the north and TH 7 to the south. The third site is I-15, which is anorth-south corridor that runs from SR 78 in the north to the SR 163 interchange in the south.I-15 is a primary artery for the movement of commuters, goods, and services from inlandnorthern San Diego County to downtown San Diego. Listed below are preliminary resultsfrom the U.S. DOT pioneer ICM sites initiative:ICM is a positive investment for all three sites. Both benefit/cost ratios and 10-year netbenefits are positive and significant across all three sites;Improved travel time reliability is the largest benefit of ICM. Reduced travel time is thesecond largest benefit, followed by fuel consumption and emissions benefits; andICM strategies produce more benefits at higher levels of travel demand and duringnonrecurrent congestion.Table 3.14 shows benefits calculated using consistent methodologies involving analysis, modeling,and simulation across the three sites. Ten-year net benefits are larger in Dallas than in3-66 I-66 Multimodal Study