Citation

Gulden J, Ewing R. ITE J. 2009; 79(12): 26-31.

Copyright

(Copyright © 2009, Institute of Transportation Engineers)

DOI

unavailable

PMID

unavailable

Abstract

This article provides an overview of a relatively new traffic calming device called a speed lump. Speed lumps consist of two or more raised and rounded areas placed laterally across a roadway with precisely spaced gaps allowing the wheel tracks of fire and rescue vehicles to pass between the lumps with minimal vertical deflection. Speed lumps offer similar speed reduction for cars as speed humps, but because speed lumps do not significantly slow emergency vehicles, they are more appropriate for emergency response routes. The gaps in speed lumps also help minimize ride discomfort for bicyclists. Although the cost of speed lumps varies depending on the size of the lumps, width of the roadway and materials used, speed lumps cost approximately the same as speed humps.