Safe and Aesthetic Design of Urban Roadside Treatments (2008) / Chapter Skim
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Appendix C - Toolkit for Urban Roadside Design
Appendix C - Toolkit for Urban Roadside Design
Pages 58-63
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From page 58... ...
Urban Control Zones An urban control zone is a roadside location that can be shown to pose a greater hazard for errant vehicles and as such should be given special attention regarding object placement strategies. Key urban control zones include lateral placement strategies, lane merge locations, driveways, intersections, and sidewalk configurations.
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From page 59... ...
Though intersections are common crash locations for multiple vehicle collisions, numerous single vehicle roadside crashes can also be expected at intersections. These collisions can occur because of the use of small islands Required Sight Distance along Drivers' Line of Sight Curb Face 4' 6' 4' 4' 4' Lateral Offset Lateral Offset at Inside of Curve Std.
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From page 60... ...
Object placement strategies include the following: • For a buffer strip 3 to 4 ft wide, rigid objects should not be constructed. Only frangible items such as breakaway signs or forgiving landscaping treatments are appropriate for use in these narrow buffer strips.
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From page 61... ...
Though the urban control zones previously identified capture most of the high roadside crash locations, a specific design or operational characteristic for a road may also be a location that merits roadside crash mitigation. These locations can be identified by creating spot maps that demonstrate cluster crash locations that do not fall within the bounds of the previously identified urban control zones.
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From page 62... ...
Utility poles, posts, light poles, and similar vertical roadside treatments are some of the most common urban roadside hazards. The urban environment, by its very nature, can be expected to include these common roadside objects.
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From page 63... ...
The following general recommendations should enhance roadside safety in these locations: • While maintaining its functional purpose, locate street furniture as far from the street as possible. • Restrict street furniture placement to avoid sight distance issues for road users.
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