A1−9: Narrowing Lanes and/or Reinforcing Shoulders to Maintain the Existing Number of Travel Lanes
The travel lanes are narrowed and shoulder lanes are reinforced (if not built strong enough initially to support traffic) in order to maintain the same number of travel lanes during a work zone. Typically at least one lane is wider than the others and trucks are restricted to the wider lane(s).
REASON(S) FOR ADOPTING:
To maintain the overall number of travel lanes in a work zone to the number available for travel without a work zone. To better accommodate future maintenance needs by building or rebuilding shoulders to a higher strength.
Maintaining the same number of lanes helps minimize congestion. Reduced lane widths can have the effect of slowing motorists, increasing the rate of attention thereby improving safety.
MOST APPLICABLE LOCATION(S)/PROJECT(S):
STATE(S) WHERE USED:
Methods and Procedures to Reduce Motorist Delay in European Work Zones