The National Academies Press

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Pages 65-67

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From page 65... ... For each of the work conditions examined, the increases in crash risk are higher for the PDO crashes than for injury and fatal crashes, indicating that the additional crashes that occur in work zones tend to be less severe in nature. This trend exists regardless of whether the work is performed during the day or at night. Read the entire page →
From page 66... ... However, the data do show that the accidents that do occur are no more severe at night than they are when they occur during the day. Management Policies, Procedures, and Practices to Improve Nighttime and Daytime Work Zone Safety Several strategies have the potential to substantially lower the increased crash costs resulting from work zones. Read the entire page →
From page 67... ... These are enumerated below: • At a minimum, agencies should evaluate their current policies and procedures to encourage consideration of the following strategies during design and implementation of work zones in their jurisdiction: – Practices to reduce work zone duration and number of work zones required; – Use of full directional roadway closures via median crossovers or detours onto adjacent frontage roads; – Use of time-related contract provisions to reduce construction duration; – Moving appropriate work activities (i.e., those that require temporary lane closures) to nighttime hours, especially on high-volume roadways; – Use of demand management programs to reduce volumes through work zones; – Use of enhanced traffic law enforcement; – Consideration of incorporating future work zone capacity into highway designs; – Use of full roadway closures that require traffic detours onto adjacent surface streets, where adequate capacity is available on alternative routes; – Use of ITS strategies to reduce congestion and improve safety; – Improvement of work zone traffic control device visibility; – Efforts to reduce flaggers' exposure to traffic; and – Efforts to reduce workspace intrusions and limit their consequences at long-term, high-volume work zones. Read the entire page →

From page 65...

... For each of the work conditions examined, the increases in crash risk are higher for the PDO crashes than for injury and fatal crashes, indicating that the additional crashes that occur in work zones tend to be less severe in nature. This trend exists regardless of whether the work is performed during the day or at night.

Read the entire page →

From page 66...

... However, the data do show that the accidents that do occur are no more severe at night than they are when they occur during the day. Management Policies, Procedures, and Practices to Improve Nighttime and Daytime Work Zone Safety Several strategies have the potential to substantially lower the increased crash costs resulting from work zones.

Read the entire page →

From page 67...

... These are enumerated below: • At a minimum, agencies should evaluate their current policies and procedures to encourage consideration of the following strategies during design and implementation of work zones in their jurisdiction: – Practices to reduce work zone duration and number of work zones required; – Use of full directional roadway closures via median crossovers or detours onto adjacent frontage roads; – Use of time-related contract provisions to reduce construction duration; – Moving appropriate work activities (i.e., those that require temporary lane closures) to nighttime hours, especially on high-volume roadways; – Use of demand management programs to reduce volumes through work zones; – Use of enhanced traffic law enforcement; – Consideration of incorporating future work zone capacity into highway designs; – Use of full roadway closures that require traffic detours onto adjacent surface streets, where adequate capacity is available on alternative routes; – Use of ITS strategies to reduce congestion and improve safety; – Improvement of work zone traffic control device visibility; – Efforts to reduce flaggers' exposure to traffic; and – Efforts to reduce workspace intrusions and limit their consequences at long-term, high-volume work zones.

Read the entire page →

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