Category:232 Facility Selection - Revision history

Hoskir: updated per RR3736

2023-07-26T15:57:47Z

updated per RR3736

← Older revision		Revision as of 10:57, 26 July 2023
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	The type of facility chosen must fulfill only the purpose and need of the corridor, no more and no less. The purpose and need of a highway corridor involves more than traffic volume alone. The desired operational level of service (LOS) of the highway is a ~~key~~ factor used when selecting the facility type.		The type of facility chosen must fulfill only the purpose and need of the corridor, no more and no less. The purpose and need of a highway corridor involves more than traffic volume alone. Refer to [[905.3_Transportation_Impact_Analysis#905.3.2.3_Determine_the_Project.E2.80.99s_Analytical_Context\|EPG 905.3.2.3]] for a more thorough explanation of this facility selection process. Many different measures of effectiveness (MOE) can be considered depending upon site-specific conditions and concerns. Some common MOE include crash frequency, speed, travel time, delay, density, queue lengths, and throughput. The desired operational level of service (LOS) of the highway is a common factor used when selecting the facility type.

	'''Level of Service (LOS)'''		'''Level of Service (LOS)'''

Smithk: Per TP, updated Major Highway System map

2022-06-03T13:12:22Z

Per TP, updated Major Highway System map

← Older revision		Revision as of 08:12, 3 June 2022
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	The methodology for determining LOS and the thresholds for the various levels described below can be found in the ''Highway Capacity Manual''.		The methodology for determining LOS and the thresholds for the various levels described below can be found in the ''Highway Capacity Manual''.

	For both [[media:144 Major Highway System ~~2021~~.pdf\|major routes]] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the traffic projection of the corridor. Typically, a 20-year traffic forecast is used for the analysis. The six LOS grades are defined as:		For both [[media:144 Major Highway System 2022.pdf\|major routes]] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the traffic projection of the corridor. Typically, a 20-year traffic forecast is used for the analysis. The six LOS grades are defined as:

	:* A - free flow		:* A - free flow

Smithk: updated major highway system map

2021-06-04T15:41:22Z

updated major highway system map

← Older revision		Revision as of 10:41, 4 June 2021
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	The methodology for determining LOS and the thresholds for the various levels described below can be found in the ''Highway Capacity Manual''.		The methodology for determining LOS and the thresholds for the various levels described below can be found in the ''Highway Capacity Manual''.

	For both [[media:144 Major Highway System.pdf\|major routes]] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the traffic projection of the corridor. Typically, a 20-year traffic forecast is used for the analysis. The six LOS grades are defined as:		For both [[media:144 Major Highway System 2021.pdf\|major routes]] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the traffic projection of the corridor. Typically, a 20-year traffic forecast is used for the analysis. The six LOS grades are defined as:

	:* A - free flow		:* A - free flow

Smithk: Per TS, numerous minor clarifications

2020-11-04T18:17:53Z

Per TS, numerous minor clarifications

← Older revision		Revision as of 13:17, 4 November 2020
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	The type of facility chosen must fulfill only the purpose and need of the corridor, no more and no less. The purpose and need of a highway corridor involves more than traffic volume alone. The desired operational level of service (LOS) of the highway is ~~the~~ factor ~~that contributes the most weight and is to be~~ used when selecting the facility type.		The type of facility chosen must fulfill only the purpose and need of the corridor, no more and no less. The purpose and need of a highway corridor involves more than traffic volume alone. The desired operational level of service (LOS) of the highway is a key factor used when selecting the facility type.

	'''Level of Service (LOS)'''		'''Level of Service (LOS)'''

	~~For both [[media:144 Major Highway System.pdf\|major routes]]~~ and ~~minor routes (those which are not "major"),~~ the ~~type of facility will~~ be ~~based upon~~ the ~~desired LOS given the 20-year traffic projection of the corridor~~. ~~The six LOS grades are defined as:~~		The methodology for determining LOS and the thresholds for the various levels described below can be found in the ''Highway Capacity Manual''.

	· A - free flow		For both [[media:144 Major Highway System.pdf\|major routes]] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the traffic projection of the corridor. Typically, a 20-year traffic forecast is used for the analysis. The six LOS grades are defined as:

			:* A - free flow
	[[image:232 Photo3 Freeway.jpg\|right\|150px\|thumb\|<center>'''Freeway'''</center>]] [[image:232 Photo2 Expressway.jpg\|right\|150px\|thumb\|<center>'''Expressway'''</center>]] [[image:232 Facility Selection rural.jpg\|right\|150px\|thumb\|<center>'''Rural 2-lane'''</center>]]		[[image:232 Photo3 Freeway.jpg\|right\|150px\|thumb\|<center>'''Freeway'''</center>]] [[image:232 Photo2 Expressway.jpg\|right\|150px\|thumb\|<center>'''Expressway'''</center>]] [[image:232 Facility Selection rural.jpg\|right\|150px\|thumb\|<center>'''Rural 2-lane'''</center>]]

	· B - reasonably free flow		:* B - reasonably free flow

	· C - stable flow		:* C - stable flow

	· D - approaching unstable flow		:* D - approaching unstable flow

	· E - unstable flow		:* E - unstable flow

	· F - forced or breakdown flow		:* F - forced or breakdown flow

	The Peak Hour LOS for the ~~20-year~~ traffic projection of a rural corridor should be D and its Off-Peak LOS should be C. The Peak Hour LOS for the ~~20-year~~ traffic projection of an urban corridor should be E and its Off-Peak Hour LOS should be D. Planning Division will continue to identify the general types of facilities for statewide system continuity.		The Peak Hour LOS for the traffic projection of a rural corridor should be D and its Off-Peak LOS should be C. The Peak Hour LOS for the traffic projection of an urban corridor should be E and its Off-Peak Hour LOS should be D. Planning Division will continue to identify the general types of facilities for statewide system continuity.

	The specific LOS of a facility is ~~sometimes~~ identified ~~only after a subjective process,~~ using traffic modeling software. In general~~, however~~, it is adequate for all routes in rural locations to accommodate the ~~20-year~~ peak hour traffic at a LOS of D and off-peak traffic at a LOS of C. Similarly, it is adequate for all roads in urban or suburban locations to accommodate the ~~20-year~~ peak hour traffic at a LOS of E, off-peak traffic at a LOS of D.		The specific LOS of a facility is typically identified using traffic modeling software. In general, it is adequate for all routes in rural locations to accommodate the peak hour traffic projection at a LOS of D and off-peak traffic at a LOS of C. Similarly, it is adequate for all roads in urban or suburban locations to accommodate the peak hour traffic projection at a LOS of E, off-peak traffic at a LOS of D. Given these LOS targets, the designer will use the formulas given in the ''AASHTO Highway Capacity Manual'', Highway Capacity Software or other traffic modeling software to determine the appropriate facility type.
	Given these LOS targets, the designer will use the formulas given in the ''AASHTO Highway Capacity Manual'', Highway Capacity Software or other traffic modeling software to determine the appropriate facility type.

	'''System Continuity'''		'''System Continuity'''
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	'''Access vs. Mobility'''		'''Access vs. Mobility'''

	In general, highways serve two purposes: providing mobility and access. All highway corridors require some aspect of both access and mobility, although the relationship between the two is indirectly proportional. As the level of mobility of a facility increases, ~~it’s~~ ability to provide access decreases and vice versa. Great care must be taken to strike an operational balance between the two, based on the project purpose and need. Nationwide, a great deal of research has been done in the area of access management. MoDOT’s [[:category:940 Access Management\|Access Management Guidelines]] (AMG) were developed by tailoring this policy to the specific needs of Missouri’s highway system. The AMG must be used to provide the proper level of balance for individual projects.		In general, highways serve two purposes: providing mobility and access. All highway corridors require some aspect of both access and mobility, although the relationship between the two is indirectly proportional. As the level of mobility of a facility increases, its ability to provide access decreases and vice versa. Great care must be taken to strike an operational balance between the two, based on the project purpose and need. Nationwide, a great deal of research has been done in the area of access management. MoDOT’s [[:category:940 Access Management\|Access Management Guidelines]] (AMG) were developed by tailoring this policy to the specific needs of Missouri’s highway system. The AMG must be used to provide the proper level of balance for individual projects.

	'''Expressway vs. Freeway'''		'''Expressway vs. Freeway'''
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	{\|style="padding: 0.3em; margin-left:7px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#ffddcc" width="340px" align="right"		{\|style="padding: 0.3em; margin-left:7px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#ffddcc" width="340px" align="right"
	\|-		\|-
	\|'''Truck Only and Passenger Vehicle Only ~~Travelways~~'''		\|'''Truck Only and Passenger Vehicle Only Research'''
	\|-		\|-
	\|[~~http~~://~~library~~.modot.mo.gov/~~RDT~~/~~reports~~/~~Ri08030~~/or10008.pdf Engineering Specifications for Construction of Truck Only and Passenger Vehicle Only Travelways - Phase 1, 2009]		\|[https://spexternal.modot.mo.gov/sites/cm/CORDT/or10008.pdf Engineering Specifications for Construction of Truck Only and Passenger Vehicle Only Travelways - Phase 1, 2009]
			\|-
			\|[https://spexternal.modot.mo.gov/sites/cm/CORDT/cmr16-017.pdf Developing a System to Identify Passing and No Passing Zone Boundaries on Rural Two-Lane Highways, 2016]
	\|-		\|-
	\|'''See also:''' [https://www.modot.org/research-publications Research Publications]		\|'''See also:''' [https://www.modot.org/research-publications Research Publications]
	\|}		\|}

	MoDOT has recently commissioned a study of passing lanes and has received the final report that will be published as engineering policy in the near future. In the interim, policy guidance on this issue will be furnished by request.

Smithk at 20:04, 18 August 2020

2020-08-18T20:04:06Z

← Older revision		Revision as of 15:04, 18 August 2020
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	\|[http://library.modot.mo.gov/RDT/reports/Ri08030/or10008.pdf Engineering Specifications for Construction of Truck Only and Passenger Vehicle Only Travelways - Phase 1, 2009]		\|[http://library.modot.mo.gov/RDT/reports/Ri08030/or10008.pdf Engineering Specifications for Construction of Truck Only and Passenger Vehicle Only Travelways - Phase 1, 2009]
	\|-		\|-
	\|'''See also:''' [~~http~~://www.modot.~~gov~~/~~services/OR/byDate.htm Innovation Library~~]		\|'''See also:''' [https://www.modot.org/research-publications Research Publications]
	\|}		\|}

	MoDOT has recently commissioned a study of passing lanes and has received the final report that will be published as engineering policy in the near future. In the interim, policy guidance on this issue will be furnished by request.		MoDOT has recently commissioned a study of passing lanes and has received the final report that will be published as engineering policy in the near future. In the interim, policy guidance on this issue will be furnished by request.

Smithk: updated "major routes" link

2019-08-05T18:34:28Z

updated "major routes" link

← Older revision		Revision as of 13:34, 5 August 2019
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	'''Level of Service (LOS)'''		'''Level of Service (LOS)'''

	For both [~~http~~:~~//sharepoint/systemdelivery/TP/sysanlysis/dmas/Shared%20Documents/Maps/MajorHighwaySystem8302015~~.pdf major routes] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:		For both [[media:144 Major Highway System.pdf\|major routes]] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:

	· A - free flow		· A - free flow

Smithk: updated link

2016-02-02T14:31:46Z

updated link

← Older revision		Revision as of 09:31, 2 February 2016
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	'''Level of Service (LOS)'''		'''Level of Service (LOS)'''

	For both [http://sharepoint/systemdelivery/TP/sysanlysis/dmas/Shared%20Documents/Maps/~~MajorHighwaySystem2015~~.pdf major routes] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:		For both [http://sharepoint/systemdelivery/TP/sysanlysis/dmas/Shared%20Documents/Maps/MajorHighwaySystem8302015.pdf major routes] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:

	· A - free flow		· A - free flow

Smithk: Per MT, updated major route link

2015-05-14T19:38:17Z

Per MT, updated major route link

← Older revision		Revision as of 14:38, 14 May 2015
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	'''Level of Service (LOS)'''		'''Level of Service (LOS)'''

	For both [http://~~wwwi~~/~~intranet~~/tp/~~documents~~/~~Major_Highway_System~~.pdf major routes] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:		For both [http://sharepoint/systemdelivery/TP/sysanlysis/dmas/Shared%20Documents/Maps/MajorHighwaySystem2015.pdf major routes] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:

	· A - free flow		· A - free flow

Smithk: added link to Corridors Visualization Explorer

2013-04-22T18:48:31Z

added link to Corridors Visualization Explorer

← Older revision		Revision as of 13:48, 22 April 2013
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	{\|style="padding: 0.3em; margin-left:15px; border:~~1px~~ solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="~~160px~~" align="right"		{\|style="padding: 0.3em; margin-left:15px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="240px" align="right"
	\|-style="background:#f5f5f5"		\|-style="background:#f5f5f5"
	\|'''Figures'''		\|'''Figures'''
	\|-		\|-
	\|[[:Category:231 Typical Section Elements for Roadways\|Typical Roadway Sections]]		\|[[:Category:231 Typical Section Elements for Roadways\|Typical Roadway Sections]]
			\|-
			\|'''Additional Resource'''
			\|-
			\|[http://teachamerica.com/cve/ Corridor Visualization Explorer], a high-level planning tool for managing corridors
	\|}		\|}

	[[image:232 Photo3 Freeway.jpg\|right\|150px\|thumb\|<center>Freeway</center>]] [[image:232 Photo2 Expressway.jpg\|right\|150px\|thumb\|<center>Expressway</center>]] [[image:232 Facility Selection rural.jpg\|right\|150px\|thumb\|<center>Rural 2-lane</center>]]
	The type of facility chosen must fulfill only the purpose and need of the corridor, no more and no less. The purpose and need of a highway corridor involves more than traffic volume alone. The desired operational level of service (LOS) of the highway is the factor that contributes the most weight and is to be used when selecting the facility type.		The type of facility chosen must fulfill only the purpose and need of the corridor, no more and no less. The purpose and need of a highway corridor involves more than traffic volume alone. The desired operational level of service (LOS) of the highway is the factor that contributes the most weight and is to be used when selecting the facility type.

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	· A - free flow		· A - free flow
			[[image:232 Photo3 Freeway.jpg\|right\|150px\|thumb\|<center>'''Freeway'''</center>]] [[image:232 Photo2 Expressway.jpg\|right\|150px\|thumb\|<center>'''Expressway'''</center>]] [[image:232 Facility Selection rural.jpg\|right\|150px\|thumb\|<center>'''Rural 2-lane'''</center>]]

	· B - reasonably free flow		· B - reasonably free flow
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	'''Two Way Left Turn Lanes'''		'''Two Way Left Turn Lanes'''
	[[image:232 Photo1 Access-Mobility.jpg\|right\|300px\|thumb\|<center>Two Way Left Turn Lane</center>]]		[[image:232 Photo1 Access-Mobility.jpg\|right\|300px\|thumb\|<center>'''Two-Way Left Turn Lane'''</center>]]

Smithk: Per Transportation Planning, updated Major Highways map

2012-09-07T15:17:36Z

Per Transportation Planning, updated Major Highways map

← Older revision		Revision as of 10:17, 7 September 2012
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	'''Level of Service (LOS)'''		'''Level of Service (LOS)'''

	For both [~~[media~~:~~major highways~~.pdf\|major routes]] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:		For both [http://wwwi/intranet/tp/documents/Major_Highway_System.pdf major routes] and minor routes (those which are not "major"), the type of facility will be based upon the desired LOS given the 20-year traffic projection of the corridor. The six LOS grades are defined as:

	· A - free flow		· A - free flow