Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles (2018) / Chapter Skim
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Pages 10-19
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10 This chapter discusses the categories of benefits and disbenefits associated with dedicating lanes to CAVs. The discussion includes: (1)
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Categories of Benefits and Disbenefits to Stakeholders 11 2.2.2 Roadway Geometry Roadway geometric configurations are likely to affect the impacts of CAV DLs. These configurations may include physical barriers, access points, length of the facility, multi-lane treatments, and shoulder use.
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12 Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles 2.2.2.2 Access Points In conjunction with the common trip characteristics, the number and locations of DL access points need to be considered thoroughly. Classification of a DL as having unlimited access or restricted access affects the lane's design and operational characteristics.
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Categories of Benefits and Disbenefits to Stakeholders 13 2.2.3 Enforcement Intensity Enforcement of the proper use of DLs is vitally important, regardless of whether the vehicles are operated using manual or automated methods. For CAV users, enforcement ensures both a high LOS on the DL and greater safety, as it reduces the likelihood that GPL vehicles will cut into the DL.
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14 Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles 2.2.7 Functional Types Given low MPRs during the initial stages of dedicating lanes for CAVs, CAVs may need to share the DL with other users, or even GPL users (e.g., in the case of HOV/HOT lanes)
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Categories of Benefits and Disbenefits to Stakeholders 15 Four major factors are associated with mobility: level of congestion, travel time reliability, average speed, and vehicle occupancy. 2.3.1.1 Level of Congestion On most occasions, the level of congestion of a roadway or a corridor provides justification for the authority to implement appropriate managed lane strategies.
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16 Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles related when demand is close to carrying capacity. To harness the optimal cruising speed for the DL, optimal average speed needs to be determined after considering the trade-offs with mobility.
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Categories of Benefits and Disbenefits to Stakeholders 17 inductive loop detectors, radar sensors, and probe vehicles (Gettman et al.
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18 Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles the situation of the community. Addressing potential equity and environmental justice issues often is vital to obtaining the support needed to implement and design DL projects.
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Categories of Benefits and Disbenefits to Stakeholders 19 should strive to attain the most equitable and feasible distribution while factoring in community acceptability and the overall transportation system impacts. 2.3.4.3 Public Outreach Public acceptance is vital for the sustainability of any DL strategy.
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