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Two-way working chicanes, which use build-outs to provide deflection, but with lanes separated by road markings or a central island. Limited crash data for chicane schemes indicate changes in injury crashes (range from −54% to +32%) and crash severity. [clarification needed] [5] [6] Chicanes can also be used to prevent access to certain vehicles.
Hairpin turn in Oregon, US A hairpin, after which the feature is named. A hairpin turn (also hairpin bend or hairpin corner) is a bend in a road with a very acute inner angle, making it necessary for an oncoming vehicle to turn about 180° to continue on the road.
The trace of a triangle wave or a sawtooth wave is a zigzag. Pinking shears are designed to cut cloth or paper with a zigzag edge, to lessen fraying. [2] In sewing, a zigzag stitch is a machine stitch in a zigzag pattern. [3] The zigzag arch is an architectural embellishment used in Islamic, Byzantine, Norman and Romanesque architecture. [4] [5]
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The completion of the process leaves a symmetrical pattern of dash marks on the roadway, as if there were an associated meaning to the pattern. [6] When there are many of them along the roadway, motorists may interpret the marks as an unknown form of mechanical markers or strange road surface markings. [7]
The selection of lane width affects the safety, maximum capacity, and cost, of a highway. Safety is best at a width of 3.0 to 3.1 metres (9.8 to 10.2 ft) in urban settings, where both narrow (less than 2.8 metres (9 ft 2 in)) and wide (over 3.1 metres (10 ft)) lanes have higher crash risks.
Zig zag (railway), a construction technique railroads use to climb hills; also called a switchback; Lapstone Zig Zag, a walking track on the line of an abandoned railway; Zig Zag Railway, a heritage railway near Lithgow; Zig Zag railway station, a railway station on the CityRail network near Lithgow, New South Wales; Kalamunda Zig Zag in ...
Rain grooved road that can cause groove wander. Groove wander, similar to tramlining, is a lateral force acting on a vehicle's wheel resulting from the combination of rain grooves (grooves cut into roads to mitigate hydroplaning in light rain conditions) and contoured deformations in the road surface upon which the wheel runs.