Roadway Cross-Section Reallocation: A Guide (2023) / Chapter Skim
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From page 25... ...
These categories are discussed in more detail in the sections below. Safety The experience of safety changes for all roadway users when a cross section is altered, even if that change is not measured in crashes in the near term.
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. Speed management -- through both speed limits and roadway design -- is critical to addressing the reduced human capacity to perceive and react in time to avoid a collision.
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. Similarly, when lanes are added for motor vehicles, vehicle volumes tend to increase.
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As noted previously, streets that communicate that pedestrians, bicyclists, transit users, and other non-automobile modes are expected and prioritized help encourage the mode shift critical for environmental well-being. Health Roadway design decisions directly affect public health in ways in addition to safety.
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Where freight routes must overlap with streets with moderate or higher amounts of pedestrian, bicyclist, and/or micromobility traffic, freight access must be secondary to the safety of those users. In practice, this means increasing the visibility of people walking, biking, or rolling; controlling vehicle speed and turning movements; and directing and monitoring parking to ensure that freight has the space needed to load and unload without blocking bike lanes -- a common complaint in dense urban areas.
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Summary Street design and roadway allocation are powerful tools that directly and indirectly affect community safety, mode use, the environment, public health, the economy, and equity in multifaceted ways. Because of the power of design, cross sections must be intentionally aligned with community goals and needs reflected in plans and policies.
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From page 31... ...
Figure 4-4. Example street designed for all modes.
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