Design Guide for Addressing Nonrecurrent Congestion (2014) / Chapter Skim
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Pages 136-151
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From page 136... ...
134 5 EXAMPLES OF DESIGN TREATMENT INSTALLATIONS Several of the treatments described in Chapters 3 and 4 have been implemented, in varying degrees, by highway agencies. They have not always been implemented for the specific purpose of reducing nonrecurrent congestion; however, lessons can still be learned from the agencies' experiences with design, construction, cost, benefits, and challenges.
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From page 137... ...
135 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION EXAMPLES OF DESIGN TREATMENT INSTALLATIONS eastbound lanes. A guardrail is located along the outside edge of the rightmost lane in both directions of travel.
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From page 138... ...
136 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION There are few recorded instances of the gates being used by emergency personnel to decrease response time. Part of the reason for the low usage rate is that this section of roadway lies between two law enforcement jurisdictions, making it difficult for dispatchers to determine which direction officers will be coming from.
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From page 139... ...
137 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION Construction costs for these projects vary depending on whether a shoulder is being converted or is part of a new construction project. Table 5.1 indicates different scenarios and the associated costs for implementation on a freeway or expressway.
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From page 140... ...
138 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION EMERGENCY PULLOFFS The Minnesota DOT made improvements to I-94 in Minneapolis in response to increased traffic demand after the I-35W bridge collapse. The improvements to I-94 included adding a lane to carry the additional traffic while the I-35W bridge was repaired.
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From page 141... ...
139 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION subsequent teardown after the race day costs Kansas DOT approximately $10,000 in wages to Kansas DOT staff and the use of Kansas DOT equipment. Many races span the 2-day weekend, so an eight-person crew from Kansas DOT and a 16-person crew from the Kansas Highway Patrol are dispatched to manually direct traffic and manage the traffic control system.
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From page 142... ...
140 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION • The construction of a southbound one-way frontage road at Broadway Avenue to provide access to local business. This project cost $400,000 and was completed in August 2007.
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From page 143... ...
141 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION • The conversion of the shoulder of westbound I-694 to a bus-only lane. This project involved sign installation only.
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From page 144... ...
142 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION REDUCED CONSTRUCTION DURATION Several techniques for reducing construction duration are employed by the Texas DOT near Dallas, Texas: • Charging the contractor a "lane rental fee" for each hour that a traffic lane is shut down • Breaking a single project into multiple phases • Paying the contractor a bonus (per day) for finishing ahead of schedule • Charging the contractor a fine (per day)
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From page 145... ...
143 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION • Dedicated truck deceleration and acceleration lanes. This technique involves the construction of an additional temporary lane within the work zone space to allow delivery trucks to decelerate when entering and accelerate when exiting.
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From page 146... ...
144 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION ANIMAL–VEHICLE COLLISION DESIGN CONSIDERATIONS Five wildlife crossings were constructed along US-93, a two-lane highway near Wells, Nevada, by the Nevada DOT between 2000 and 2010. This section of roadway is along a migratory path of mule deer.
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From page 147... ...
145 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION are involved in the Houston evacuation route, so dispatching all necessary personnel can be an expensive undertaking. Texas DOT has posted several videos illustrating and explaining the use of emergency evacuation routes.
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From page 148... ...
146 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION WORK ZONE EXPRESS LANES Work zone express lanes were used during a construction project in downtown Tucson, Arizona, along the I-10 corridor from 2007 through 2009. The existing freeway improvements included lane additions and the reconstruction of seven bridges and underpasses along a 4.5-mi segment as part of a $200 million project.
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From page 149... ...
147 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION and SR-99. The system includes 36 traffic speed monitoring sites, nine complete report meteorological stations, and nine changeable message signs for warning drivers.
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From page 150... ...
148 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION From December 1993 to January 1995, there were 77 activations for fog. All activations required lowering the speed limit to 50 mph; 10 of the activations required a further lowering of the speed to 35 mph.
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From page 151... ...
149 DESIGN GUIDE FOR ADDRESSING NONRECURRENT CONGESTION WIND WARNING SYSTEM Oregon A wind warning system used on the Yaquina Bay Bridge in Oregon includes an anemometer to measure wind speed, which automatically activates flashing beacons on two static signs when wind speeds reach a preset level. This system was constructed for approximately $20,000.
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