Engineering Commons^™

Development Of A 7.62-M Long Span Guardrail System – Phase Ii, Karla A. Polivka, Robert W. Bielenberg, Dean L. Sicking, Ronald K. Faller, John R. Rohde, Eric A. Keller

Mid-America Transportation Center: Final Reports and Technical Briefs

A 7.62-m long span guardrail system was developed for use over low-fill culverts. The long span design was constructed with two 2.66-mm (12-gauge) thick nested W-beam rails totaling 30.48 m in length. The nested W-beam rail was supported by sixteen W150x13.5 steel posts and six standard CRT posts, each with two 150x200x360 wood blockouts. Each post measured 1,830-mm long. Post spacings were 1,905-mm on center except for the 7.62-m spacing between the two CRT posts surrounding the unsupported span.

The research study included full-scale vehicle crash testing, using a 3⁄4-ton pickup truck. The test, impacting at a speed of 102.9 …

Compliance Testing Of Iowa’S Skid-Mounted Sign Device, Karla A. Polivka, Ronald K. Faller, John R. Rohde, James C. Holloway, Dean L. Sicking

Mid-America Transportation Center: Final Reports and Technical Briefs

A wide variety of traffic control devices are used in work zones, some of which are nont ormally found on the roadside or in the traveled way outsideofthe work zones. These devices are used to enhance the safety of the work zones by controlling the traffic through these areas. Due to the placement of the traffic control devices, the devices themselves may be potentially hazardous to both workers and errant vehicles. The impact performance of many work zone traffic control devices is mainly unknown and to date limited crash testing has been conducted under the criteria of National Cooperative Highway …