Optimizing the analysis of routing oversize/overweight loads to provide efficient freight corridors.
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2012-07-01
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Edition:Final report; Nov. 2010¿Feb. 2012.
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Abstract:The subject of this report is limited specifically to Kansas’ highways. Current features of the State
Highway System were looked at to determine corridors that do not limit Oversize/Overweight (OS/OW)
vehicles, or that limit loads to varying degrees. Now that roundabouts are becoming more common
throughout the state and the nation, many individuals, both in the public and private sectors, believe that the
main concern for efficient movement of oversized loads are roundabouts that were being constructed.
However, information that has been collected indicates that vertical clearance, diamond interchanges, curbs,
non-removable signs, enhancements at pedestrian crosswalks all limit the ability for over-length loads to
make turns to varying degrees. While it is not usually feasible to remove structures with limited vertical
clearance, it is feasible to develop policies to better control OS/OW movements.
There is a trade-off between what shippers might want to move and what the agencies responsible for the
design of the highway/street system can provide. The use of a steerable rear axle has allowed many oversize
loads to make crucial turns at intersections or at ramps of interchanges that were previously a barrier. The
vertical height restriction of low clearance structures is not easily solved. Developing a freight network
which includes segments where selected OS/OW vehicles can be accommodated is becoming increasingly
important. There is an economic benefit to the State of Kansas to allow OS/OW loads and this should be
balanced with the economic burden of providing this ever increasing demand on public roads.
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