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- W607115930 abstract "With improvements being made to freeways and expressways, the problem of inadequate stopping sight distance on curves accompanying installation of a concrete barrier may arise. This could also occur when lanes are added in the median of a freeway or expressway and a narrow median results. It also may become a problem on curved ramps on structures where the parapet may not be offset sufficiently from the traveled-way. One solution to the problem for freeway medians is to provide a wider shoulder (greater offset to barrier) for the traveled-way turning to the left. Where a constant median width exists, the left shoulder for the opposing direction is, of course, narrowed. When a ramp is on a structure (bridge or retaining wall) and there is a curve to the left, the traveled-way can be shifted to the right, providing a wider left shoulder for sight distance and breakdown. The right shoulder would then be narrowed, preferably to not less than 4 ft. It must be kept in mind that stopping sight distance is only one of many design and operational considerations in planning an improvement. There certainly can be trade-offs with other features and the potential influence on accident experience. Further study is needed to ascertain the optimum dimensions of all cross-sectional elements to best satisfy safety, operational, and design requirements." @default.
- W607115930 created "2016-06-24" @default.
- W607115930 creator A5059472547 @default.
- W607115930 date "1989-01-01" @default.
- W607115930 modified "2023-09-23" @default.
- W607115930 title "HORIZONTAL SIGHT DISTANCE CONSIDERATIONS IN FREEWAY AND INTERCHANGE RECONSTRUCTION" @default.
- W607115930 hasPublicationYear "1989" @default.
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