Strategic Issues Facing Transportation, Volume 5: Preparing State Transportation Agencies for an Uncertain Energy Future (2014) / Chapter Skim
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Pages 170-180
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170 The preceding appendices have focused on alternative fuels and emerging vehicle technologies in the light-duty fleet, including passenger cars, pickup trucks, vans, and sport utility vehicles. This appendix shifts focus to MHDVs, beginning by introducing the types and applications of MHDVs and then discussing the alternative fuels and vehicle technology improvements currently being examined in the context of MHDVs.
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171 consumption of all MHDVs, even though they only make up about 16% of the entire MHDV fleet. Class 6 and Class 2b vehicles are each responsible for another 12% to 13% of total MHDV fuel consumption.
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172 dominant sectors are for-hire transportation and warehousing, construction, and agriculture. Note that MHDVs in the leased vehicle category can be employed by the lessee for a broad range of applications, including transportation and construction (ORNL 2012)
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173 for-hire transportation and warehousing sector, in contrast, relies most frequently on truck stops. Still, in several of the sectors, including for-hire transportation and warehousing, agriculture, utilities, vehicle leasing, and mining, nearly 25% or more of all MHDVs refuel at their own facilities, creating greater potential for a transition to alternative fuels.
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174 Daily range. Operating range describes the distance from the central facility within which an MHDV must operate on a daily basis.
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175 another maintenance site at moderate speed, repeating the cycle several times over the course of the day. A transit bus may have several different modes of operation, depending on the type of route.
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176 appointed a special committee to assess fuel economy technologies for medium- and heavy-duty vehicles (NRC 2010)
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177 than gasoline (Hileman et al.
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178 and recycle energy that would otherwise be lost during braking. The net effect is to improve fuel economy, especially when the use of the MHDV requires a significant amount of starting and stopping.
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179 buses or small bus fleets operating in cities across the country [National Renewable Energy Laboratory (NREL)
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180 EPA and NHTSA.
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