|
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.
|
Temporary
Installation
N/A
|
Permanent
Installation
|
PROS
1.
Can be used to prevent cut-through traffic.
2. Relatively low cost option.
3. Most effective if limited to peak hours.
|
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.
|
Summary
of Effectiveness
|
Volume
Reduction
|
Yes
|
|
Speed
Reduction
|
No
|
|
Safety
Improvement
|
Unknown
|
|
-
|
-
|
|
Streets
to Use On – Collector, Local
|
Local/Collector
|
|
Use
on Bus Route
|
Yes
|
|
Use
with Curbs and Gutters
|
Yes
|
|
Spot
or Area-wide Use
|
Area
|
|
-
|
-
|
|
Emergency
Service Access Issues
|
Yes
|
|
Impacts
on Arterials
|
Possible
|
|
Change
in % Trucks
|
Unknown
|
|
Environmental
Changes
|
No
|
|
-
|
-
|
|
Dependence
on Enforcement
|
Some
|
|
Level
of Violation
|
20-50%
|
|
-
|
-
|
|
Aesthetics
and Landscaping
|
No
|
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