Floodway_(road)

Floodway (road)

Floodway (road)

Road that is subjected to flooding

This article is about floodplain crossings for roads. For shallow waterway crossings, see Ford (crossing). For areas that are reserved for flood flows, see Floodplain § Flood control.

A floodway is a flood plain crossing for a road, built at or close to the natural ground level.[1] It is similar to a causeway, but crosses a shallow depression that is subject to flooding, rather than a waterway or tidal water.[2]

A floodway on a gravel road

They are designed to be submerged under water, but withstand such conditions. Typically floodways are used when the flood frequency or time span is minimal, traffic volumes are low, and the cost of a bridge is uneconomic[2][3] – in most cases, in rural areas.


Floodway on Great Northern Highway, Western Australia
Floodway and signs, eastern side of Southern Cross, Western Australia
Floodway (road goes across the photo) in Baja California, Mexico. Note bridge behind it.

See also

Notes

  1. [2]
    MRWA Waterways Section; BG&E Pty Ltd (24 April 2006). "Floodway Design Guide" (PDF). Main Roads Western Australia. p. 4. Archived from the original (PDF) on 15 April 2015. Retrieved 15 April 2015. "Archived copy" (PDF). Archived from the original (PDF) on 15 April 2015. Retrieved 22 April 2015.{{cite web}}: CS1 maint: archived copy as title (link)
  2. [3]
    Austroads; Flavell, David; Audora, Henry (1994), Waterway design : a guide to the hydraulic design of bridges, culverts and floodways, Austroads, ISBN 978-0-85588-440-6


Stub icon

This engineering-related article is a stub. You can help Wikipedia by expanding it.

Stub icon

This road-related article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Floodway_(road), and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.