Traffic Enforcement Strategies for Work Zones (2013) / Chapter Skim
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Pages 6-21
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From page 6... ...
6Law enforcement agencies employ a range of techniques and strategies as part of their normal traffic enforcement duties. Most of these strategies are appropriate for use in work zone locations as well.
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7 comes from state DOT office and enforcement agency personnel who believe the potential threat of citation must be maintained at all times to avoid a loss of enforcement agency credibility with the motoring public. There have been anecdotal comments by some agencies that extensive reliance on traffic-calming enforcement practices has resulted in a lack of driver response to enforcement vehicles over time.
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8The advantages of this strategy are the following: • This approach eliminates the pursuit of the violator into and/or through the work zone in order to issue a citation. • This approach maintains the visibility and traffic-calming effect of the upstream enforcement vehicle at a point, since it does not have to leave its location.
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9 ing the likelihood of high-speed rear-end crashes between approaching traffic and vehicles already in the queue. As the upstream end of the queue grows or dissipates over time, the officer moves the vehicle along the shoulder to remain approximately 0.25 miles upstream of the queue.
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10 Automated and Semi-Automated Speed Enforcement Techniques Presently, the Illinois DOT, the Washington State DOT, and the Maryland State Highway Administration (MDSHA) all utilize semi-automated speed enforcement technology to electronically identify violators in work zones and to capture an image of the vehicle embedded with speed, location, date, and time information about the violation.
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11 geometrics and alignment of the work zone design (and thus present at all times)
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12 feature, or if crashes in a particular work zone increase significantly in the vicinity of such a feature, the provision of work zone enforcement to modify driving behavior on a continuous basis may be appropriate. For work activity-based hazards, the need to provide enforcement is dictated by when and how often such work activities are to occur.
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13 to a 22 to 25 percent reduction in non-fatal injury crashes, and to a 33 to 42 percent drop in fatal crashes (11)
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14 Work Zone Enforcement Deployment Procedures Safe work zones are the result of good planning and execution. This is especially true with regard to the utilization of law enforcement.
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15 Figure 7. Suggested stationary enforcement position for lane closure when work activity area is less than 1 mile from the merging taper.
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16 • If the officer is located outside of the vehicle to function as a police traffic controller, appropriate ANSI-approved safety apparel must be worn, and • The condition of traffic flow should be monitored, and the POCs notified if problems develop. Obviously, these items would not necessarily apply when active enforcement was being used in or around the work zone.
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17 Figure 9. Suggested enforcement positioning in mobile operation convoy when continuous shoulder is available for travel.
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18 Figure 10. Suggested enforcement positioning in mobile operation convoy in left lane when a continuous right shoulder is available for travel.
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19 Figure 11. Suggested enforcement positioning in mobile operation convoy when no continuous shoulder is available for travel.
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20 Figure 12. Suggested stationary enforcement position at alternating one-lane operations.
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21 Road Type Distance Between Signs*
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