Impact of transportation demand management (TDM) elements on managed lanes toll prices.
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2015-03-01
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Abstract:This research involved a simulation comparing three days of actual traffic data for the I-95 Express ; Lanes and General Purpose Lanes in Miami, Florida to a hypothetical scenario where all transportation ; demand management (TDM) activities and toll exemptions were eliminated. The purpose of the ; research was to quantify the extent to which carpooling, vanpooling, and transit usage contribute to ; better traffic flow in the I-95 corridor. The express lane analysis revealed a slight degradation in level of ; service (LOS) and a moderate increase in tolls in the southbound direction (+$0.41). It revealed a slight ; improvement in LOS and a slight decrease in tolls in the northbound direction (-$0.19). A phenomenon ; that occurred was that a large number of inherently low emission vehicles (ILEVs), which are toll ; exempt, opted out of the express lanes in the hypothetical scenario. The increase in express lane volume ; from former carpoolers, vanpoolers, and transit riders reverting to single occupant status was often ; offset by even larger volumes of ILEVs leaving the express lanes. Although the traffic impact to the ; express lanes was mild, the impact to the general purpose lanes was more severe. In the hypothetical ; scenario, the general purpose lanes operated at LOS F 22 percent more of time in the southbound ; direction and 8 percent more of the time in the northbound direction. Furthermore, the traffic densities ; in the general purpose lanes increased 100 percent of the time in the southbound direction and 94 ; percent of the time in the northbound direction.
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Main Document Checksum:urn:sha256:456902d9b23b1bca972aacaafab940fc52eae27c2d5537ca2c6d54a58e678dfa