231.8 Bridge Width - Revision history

Smithk at 20:51, 26 January 2021

2021-01-26T20:51:49Z

← Older revision		Revision as of 15:51, 26 January 2021
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	::* 24 feet.		::* 24 feet.

	::<sup>1</sup>2 feet per side minimum		::<sup>1</sup> 2 feet per side minimum



	[[category:231 Typical Section Elements for Roadways\|231.08]]		[[category:231 Typical Section Elements for Roadways\|231.08]]

Smithk: Per BR, dropped superscript "1" at the end of the first bullet point. There was concern that on Design-build projects they would just use 2’ instead of the full shoulder width.

2021-01-26T20:50:58Z

Per BR, dropped superscript "1" at the end of the first bullet point. There was concern that on Design-build projects they would just use 2’ instead of the full shoulder width.

← Older revision		Revision as of 15:50, 26 January 2021
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	The minimum roadway width for new bridges shall be the greatest of:		The minimum roadway width for new bridges shall be the greatest of:
	::* Width of approach travelway + shoulders~~<sup>1</sup>~~		::* Width of approach travelway + shoulders
	::* Width of approach travelway + 4 feet<sup>1</sup>		::* Width of approach travelway + 4 feet<sup>1</sup>
	::* 24 feet.		::* 24 feet.

Smithk: Per BR, 24 ft. is not a new criterion, but EPG 231.8 was overlooked when this criterion was updated

2020-12-31T18:55:10Z

Per BR, 24 ft. is not a new criterion, but EPG 231.8 was overlooked when this criterion was updated

← Older revision		Revision as of 13:55, 31 December 2020
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	~~Bridge~~ width~~, exclusive of sidewalks,~~ shall be ~~equivalent to~~ the ~~existing or, if wider, proposed~~ approach ~~roadway (i.e., traveled way and any~~ shoulders~~) width.~~ ~~In the absence~~ of ~~shoulders, the bridge width shall be~~ 4 ft. (2 ~~ft.~~ per side) wider than the approach traveled way width. Greater bridge widths may be considered if future expansion of the facility will occur within the first half of the expected life of the bridge improvement, shared-use lanes will be constructed immediately adjacent to the roadway, or to facilitate construction.		The minimum roadway width for new bridges shall be the greatest of:
			::* Width of approach travelway + shoulders<sup>1</sup>
			::* Width of approach travelway + 4 feet<sup>1</sup>
			::* 24 feet.

			::<sup>1</sup>2 feet per side minimum



	[[category:231 Typical Section Elements for Roadways\|231.08]]		[[category:231 Typical Section Elements for Roadways\|231.08]]

Smithk: Per BR, revision coordinated with Green Book guidance that clear bridge width shall be the same as the approach roadway for collectors, arterials and freeways.

2018-08-13T17:18:55Z

Per BR, revision coordinated with Green Book guidance that clear bridge width shall be the same as the approach roadway for collectors, arterials and freeways.

← Older revision		Revision as of 12:18, 13 August 2018
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	Bridge width ~~will vary based on project scope~~, ~~context~~ of ~~surrounding road~~, future plans for the route, and Deck Geometry rating (NBI Item 68). Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from new, replacement, widening, redecking and rehabilitation bridge construction.		Bridge width, exclusive of sidewalks, shall be equivalent to the existing or, if wider, proposed approach roadway (i.e., traveled way and any shoulders) width. In the absence of shoulders, the bridge width shall be 4 ft. (2 ft. per side) wider than the approach traveled way width. Greater bridge widths may be considered if future expansion of the facility will occur within the first half of the expected life of the bridge improvement, shared-use lanes will be constructed immediately adjacent to the roadway, or to facilitate construction.

	~~'''Major Roads'''~~

	~~The desirable width of bridges on Major roads is~~ equivalent to the ~~width of the traveled way and any~~ existing or proposed ~~shoulders~~. ~~The minimum width of bridges for Major roads is 24 ft~~., ~~that is, there could be situations where an existing bridge may be rehabilitated and used in place even though it may not be the desirable width.~~

	~~'''Minor Roads'''~~

	~~The desirable minimum width of bridges on Minor roads is equivalent to the width of the~~ traveled way and~~, 1)~~ any ~~existing or proposed~~ shoulders ~~or, 2~~) ~~2 ft~~. shoulders, ~~whichever is greatest.~~

	~~'''Major and Minor Roads (Based on NBI Deck Geometry Rating)'''~~

	~~The bridge width based on Major/Minor Roads classification could conflict with~~ the ~~minimum~~ bridge ~~roadway~~ width ~~based on the Deck Geometry rating of the National Bridge Inventory~~ (~~NBI) rating system~~. ~~FHWA requires all bridges on public roads to be inventoried and inspected in accordance with the National Bridge Inspection Standards (NBIS~~) ~~within which~~ the ~~NBI operates~~. ~~The FHWA holds MoDOT responsible for collecting and submitting~~ the ~~bridge inventory data for all bridges~~ within the ~~state.~~

	~~The engineer should determine~~ the ~~roadway width~~ of the bridge ~~based on site~~-~~specific conditions. Once this width is determined, it should~~ be ~~checked against the following table in order~~ to ~~evaluate if new, replacement, widening, redecking or rehabilitation bridge construction would be considered to be deficient based on its deck geometry. If~~ the ~~proposed bridge~~ roadway ~~width is less than that shown in the following tables~~, ~~the width provided in the table should be used or a design exception could be considered. Only under extraordinary circumstances should a design exception be considered for new~~ or ~~replacement bridge construction since the goal at MoDOT and FHWA is~~ to ~~reduce the number of deficient bridges and also since funding sources for bridge construction could be influenced. For other types of bridge~~ construction~~, design exceptions should be considered under normal circumstances.~~
	~~<center>~~
	~~===Minimum Bridge Width Based on Deck Geometry Rating<sup>1</sup>===~~


	~~{\| border="1" class="wikitable" style="margin: 1em auto 1em auto" style="text-align:center" width="800"~~
	\|+
	! style="background:#BEBEBE" \|Roadway Classification\|\|style="background:#BEBEBE"\| Facility Type<sup>2</sup>\|\|style="background:#BEBEBE"\| Future or Design ADT<sup>3</sup>\|\|style="background:#BEBEBE"\|Width<sup>4</sup> (Ft.)
	\|-
	~~\|rowspan="11" \|Major\|\|rowspan="6" \|2-Lane/2-Way\|\| < 100 \|\|18~~
	\|-
	~~\|101 - 400\|\|20~~
	\|-
	~~\|401 - 1000\|\|22~~
	\|-
	~~\|1001 - 2000\|\|24~~
	\|-
	~~\|2001 - 5000\|\|28~~
	\|-
	~~\|>5000\|\|32(28)<sup>5</sup>~~
	\|-
	~~\|2-Lane/1-Way\|\|rowspan="5"\|All\|\|34(29)<sup>5</sup>~~
	\|-
	~~\|3-Lane/1-Way\|\| 45(40)<sup>5</sup>~~
	\|-
	~~\|4-Lane/1-Way\|\| 56(51)<sup>5</sup>~~
	\|-
	~~\|5-Lane/1-Way\|\| 67(62)<sup>5</sup>~~
	\|-
	~~\|6-Lane/1-Way\|\| 78(73)<sup>5</sup>~~
	\|-
	~~\|rowspan="11" \|Minor\|\|rowspan="6"\|2-Lane/2-Way\|\|< 100\|\|\|18~~
	\|-
	~~\|101 - 400\|\|20~~
	\|-
	~~\|401 - 1000\|\|22~~
	\|-
	~~\|1001 - 2000\|\|24~~
	\|-
	~~\|2001 - 5000\|\|28~~
	\|-
	~~\|>5000\|\|32(28)<sup>5</sup>~~
	\|-
	~~\|2-Lane/1-Way\|\|rowspan="5"\|All\|\|30~~
	\|-
	~~\|3-Lane/1- or 2-Way\|\| 39~~
	\|-
	~~\|4-Lane/1- or 2-Way\|\| 50~~
	\|-
	~~\|5-Lane/1- or 2-Way\|\| 61~~
	\|-
	~~\|6-Lane/1- or 2-Way\|\| 72~~
	\|-
	~~\|rowspan="3"\|Ramp\|\|1-Lane/1-Way\|\|rowspan="3"\|All\|\|18~~
	\|-
	~~\|2-Lane/1-Way\|\| 28~~
	\|-
	~~\|3-Lane/1-Way\|\| 40~~
	\|-
	~~\|colspan="4" align="left"\|'''<sup>1</sup>''' Table based on NBI Item No. 68 - Deck Geometry of the ''Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation's Bridges''.~~
	\|-
	~~\|colspan="4" align="left"\|'''<sup>2</sup>''' Where facility type is not listed, see State Bridge Engineer.~~
	\|-
	~~\|colspan="4" align="left"\|'''<sup>3</sup>''' Includes ADT for both directions of traffic, where applicable.~~
	\|-
	\|colspan="4" align="left"\|'''<sup>4</sup>''' Minimum width is based on a deck geometry code = 4, which is defined as "meets minimum tolerable limits to be left in place as is". Any width less than this will result in a deficient bridge width (i.e., bridge would be considered functionally obsolete).
	\|-
	~~\|colspan="4" align="left"\|'''<sup>5</sup>''' May use value in parenthesis for bridges longer than 200 ft~~.
	\|}




	[[category:231 Typical Section Elements for Roadways\|231.08]]		[[category:231 Typical Section Elements for Roadways\|231.08]]

Smithk: Per BR, Criteria for minimum bridge width expanded to include National Bridge Inventory rating system requirements for bridge width

2016-08-24T17:22:34Z

Per BR, Criteria for minimum bridge width expanded to include National Bridge Inventory rating system requirements for bridge width

@@ Line 1: / Line 1: @@
-Bridge width will vary based on project scope, context of surrounding road and future plans for the route.  Project scope and bridge economics usually determine the treatment strategy for individual projects.  Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement.
+Bridge width will vary based on project scope, context of surrounding road, future plans for the route, and Deck Geometry rating (NBI Item 68). Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from new, replacement, widening, redecking and rehabilitation bridge construction.
 '''Major Roads'''
-The desirable width of bridges on Major roads includes the traveled lanes and shoulders.  The minimum width of bridges for Major roads is 24 ft., that is, there could be situations where an existing bridge may be rehabilitated and used in place even though it may not be the desirable width.
+The desirable width of bridges on Major roads is equivalent to the width of the traveled way and any existing or proposed shoulders. The minimum width of bridges for Major roads is 24 ft., that is, there could be situations where an existing bridge may be rehabilitated and used in place even though it may not be the desirable width.
 '''Minor Roads'''
-The desirable minimum width of bridges on Minor roads includes the traveled lanes and 2 ft. shoulders.  For routes with 10 ft. lanes, the bridge width to strive for is 24 ft. and for routes with 12 ft. lanes, the desirable width is 28 ft.
+The desirable minimum width of bridges on Minor roads is equivalent to the width of the traveled way and, 1) any existing or proposed shoulders or, 2) 2 ft. shoulders, whichever is greatest.
 [[category:231 Typical Section Elements for Roadways|231.08]]

Jonesjb: Removed inaccurate design information concerning shoulder requirements

2011-12-28T15:28:30Z

Removed inaccurate design information concerning shoulder requirements

← Older revision		Revision as of 10:28, 28 December 2011
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	Bridge width will vary based on project scope, context of surrounding road and future plans for the route. Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement~~. Bridges over 1000 ft long require full width shoulders so that disabled vehicles can be accommodated~~.		Bridge width will vary based on project scope, context of surrounding road and future plans for the route. Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement.

	'''Major Roads'''		'''Major Roads'''

Smithk: minor clarifications

2010-04-01T16:11:39Z

minor clarifications

← Older revision		Revision as of 11:11, 1 April 2010
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	Bridge width will vary based on project scope, context of surrounding road and future plans for the route. Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement. Bridges over ~~1000’ in length~~ require full width shoulders so that disabled vehicles can be accommodated.		Bridge width will vary based on project scope, context of surrounding road and future plans for the route. Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement. Bridges over 1000 ft long require full width shoulders so that disabled vehicles can be accommodated.

	'''Major Roads'''		'''Major Roads'''

	The desirable width of bridges on Major roads includes the traveled lanes and shoulders. The minimum width of bridges for Major roads is ~~24’~~, that is, there could be situations where an existing bridge may be rehabilitated and used in place even though it may not be the desirable width.		The desirable width of bridges on Major roads includes the traveled lanes and shoulders. The minimum width of bridges for Major roads is 24 ft., that is, there could be situations where an existing bridge may be rehabilitated and used in place even though it may not be the desirable width.

	'''Minor Roads'''		'''Minor Roads'''

	The desirable minimum width of bridges on Minor roads includes the traveled lanes and 2’ shoulders. For routes with ~~10’~~ lanes, the bridge width to strive for is ~~24’~~ and for routes with ~~12’~~ lanes, the desirable width is ~~28’~~.		The desirable minimum width of bridges on Minor roads includes the traveled lanes and 2 ft. shoulders. For routes with 10 ft. lanes, the bridge width to strive for is 24 ft. and for routes with 12 ft. lanes, the desirable width is 28 ft.

	[[category:231 Typical Section Elements for Roadways\|231.08]]		[[category:231 Typical Section Elements for Roadways\|231.08]]

EPG-Admin: remove "Key Points" box

2008-11-13T17:12:31Z

remove "Key Points" box

← Older revision		Revision as of 12:12, 13 November 2008
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	~~{\|border="4"~~
	\|-
	~~\|style="background:yellow"\|'''[[Key Points 231.8 Bridge Width\|Key Points]]'''~~
	\|}

	Bridge width will vary based on project scope, context of surrounding road and future plans for the route. Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement. Bridges over 1000’ in length require full width shoulders so that disabled vehicles can be accommodated.		Bridge width will vary based on project scope, context of surrounding road and future plans for the route. Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement. Bridges over 1000’ in length require full width shoulders so that disabled vehicles can be accommodated.

EPG-Admin at 15:33, 14 December 2006

2006-12-14T15:33:27Z

New page

{|border="4"
|-
|style="background:yellow"|'''[[Key Points 231.8 Bridge Width|Key Points]]'''
|}

Bridge width will vary based on project scope, context of surrounding road and future plans for the route. Project scope and bridge economics usually determine the treatment strategy for individual projects. Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement. Bridges over 1000’ in length require full width shoulders so that disabled vehicles can be accommodated.

'''Major Roads'''

The desirable width of bridges on Major roads includes the traveled lanes and shoulders. The minimum width of bridges for Major roads is 24’, that is, there could be situations where an existing bridge may be rehabilitated and used in place even though it may not be the desirable width.

'''Minor Roads'''

The desirable minimum width of bridges on Minor roads includes the traveled lanes and 2’ shoulders. For routes with 10’ lanes, the bridge width to strive for is 24’ and for routes with 12’ lanes, the desirable width is 28’.

[[category:231 Typical Section Elements for Roadways|231.08]]