This publication contains 23 papers that explore spacing between freeway ramps, three-dimensional alignment, sight distance, design consistency for two-lane highways, passing process on two-lane rural highways, reduced-conflict intersections, operational interactions between freeway managed lanes and parallel, general purpose lanes, and sight distance measurement. This TRR also examines bridge rail and approach railing for low-volume roads, nonblocked guardrail system for wire-faced walls of mechanically stabilized earth, low-cost, energy-absorbing bridge rail, two bridge railings for transverse nail-laminated timber deck bridges, short-radius guardrail system, effect of barrier type on injury severity in motorcycle-to-barrier collisions, and bioretention boxes in hot and semiarid regions. In addition, this TRR highlights sustainable management strategies for roadside vegetation; context-sensitive solutions; hydrographs and estimates of scour depth excess for pier scour prediction; estimating joint flow probabilities at stream confluences; hydrologic uncertainty in prediction of bridge scour; removal, by vegetated biofilter, of medium and low concentrations of pollutants in highway runoff; and utility challenges in project development. (Author/publisher)
Abstract