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TURN RESTRICTION/PROHIBITION SIGNS
Turn restrictions prohibit movements at designated intersections - often during specified peak hours. Full-time turn restrictions are not as effective. Compliance is a problem with un-enforced turn-restrictions with about 50% violation. Enforced restrictions have about 20% violations rates. (Source: Traffic Calming: State of the Practice - ITE, 1999)
Like one-way streets, turn restrictions can result in inconvenience to residents by making access to some properties indirect, and they may also affect emergency response times. However, they can be used effectively to control cut-through traffic.
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Temporary Installation
N/A
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Permanent Installation
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PROS
1. Can be used to prevent cut-through traffic.
2. Relatively low cost option.
3. Most effective if limited to peak hours.
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CONS
1. May cause inconvenience for residents and emergency response.
2. May have enforcement problems.
3. Work better with active enforcement.
4. May affect adjacent streets and intersections.
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Summary of Effectiveness
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Volume Reduction
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Yes
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Speed Reduction
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No
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Safety Improvement
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Unknown
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-
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-
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Streets to Use On Collector, Local
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Local/Collector
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Use on Bus Route
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Yes
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Use with Curbs and Gutters
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Yes
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Spot or Area-wide Use
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Area
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-
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-
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Emergency Service Access Issues
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Yes
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Impacts on Arterials
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Possible
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Change in % Trucks
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Unknown
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Environmental Changes
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No
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-
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-
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Dependence on Enforcement
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Some
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Level of Violation
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20-50%
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-
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-
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Aesthetics and Landscaping
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No
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