910.3 Dynamic Message Signs (DMS) - Revision history

Hoskir: updated link to Ozark Traffic

2024-08-20T20:57:52Z

updated link to Ozark Traffic

← Older revision		Revision as of 15:57, 20 August 2024
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	'''Support.''' Dynamic Message Signs (DMSs) are stationary traffic control devices capable of displaying one or more alternative messages that provide travelers with real-time, traffic-related variable messages. DMSs are used to warn, regulate, route and manage traffic.		'''Support.''' Dynamic Message Signs (DMSs) are stationary traffic control devices capable of displaying one or more alternative messages that provide travelers with real-time, traffic-related variable messages. DMSs are used to warn, regulate, route and manage traffic.

	MoDOT operates DMSs through its transportation management centers (TMCs) in Kansas City ([http://www.kcscout.net/ KC Scout]), St. Louis ([http://www.gatewayguide.com/ Gateway Guide]) and Springfield ([~~http~~://www.ozarkstraffic.~~info~~/~~index.html~~ Ozarks Traffic]). Each of these TMCs operates DMSs within its metropolitan coverage area. The KC Scout and Gateway Guide TMCs also operate DMSs on the statewide rural I-29, I-35, I-44, I-55, I-57, I-70 and US 60.		MoDOT operates DMSs through its transportation management centers (TMCs) in Kansas City ([http://www.kcscout.net/ KC Scout]), St. Louis ([http://www.gatewayguide.com/ Gateway Guide]) and Springfield ([https://www.ozarkstraffic.com/ Ozarks Traffic]). Each of these TMCs operates DMSs within its metropolitan coverage area. The KC Scout and Gateway Guide TMCs also operate DMSs on the statewide rural I-29, I-35, I-44, I-55, I-57, I-70 and US 60.

	==910.3.1 National DMS Policy==		==910.3.1 National DMS Policy==

Legged1: erratum

2022-07-06T21:10:39Z

erratum

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	When using graphics or color for a message, there are best practices that should be followed:		When using graphics or color for a message, there are best practices that should be followed:
	:* Do no use graphics that have lettering smaller than 18”. Any lettering smaller than that cannot be read at ~~fee~~ flow speeds and will then be clutter on the sign.		:* Do no use graphics that have lettering smaller than 18”. Any lettering smaller than that cannot be read at free flow speeds and will then be clutter on the sign.
	:* Avoid graphics that cover the entire sign. These large images take longer to push to a DMS and as previously mentioned there is a size limitation on the number of bytes allowed to be displayed according to NTCIP.		:* Avoid graphics that cover the entire sign. These large images take longer to push to a DMS and as previously mentioned there is a size limitation on the number of bytes allowed to be displayed according to NTCIP.
	:* Avoid using full background color in the nighttime conditions. Full background color at night can cause a washout effect of the text or other image being displayed. In addition, the sign will be appear too bright to the driver in dark conditions.		:* Avoid using full background color in the nighttime conditions. Full background color at night can cause a washout effect of the text or other image being displayed. In addition, the sign will be appear too bright to the driver in dark conditions.

Smithk: Updated website links for increased security

2021-10-27T12:54:25Z

Updated website links for increased security

Smithk: updated links

2020-07-02T13:34:59Z

updated links

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	'''Guidance.''' The luminance of DMSs should meet industry criteria for daytime and nighttime conditions. Luminance contrast should be between 8 and 12 for all conditions. Contrast orientation of DMSs should be positive, that is, with luminous characters on a dark or less luminous background. When displaying color messages avoid using full background color in nighttime conditions. Full background color at night can cause a washout effect of the text or other image being displayed.		'''Guidance.''' The luminance of DMSs should meet industry criteria for daytime and nighttime conditions. Luminance contrast should be between 8 and 12 for all conditions. Contrast orientation of DMSs should be positive, that is, with luminous characters on a dark or less luminous background. When displaying color messages avoid using full background color in nighttime conditions. Full background color at night can cause a washout effect of the text or other image being displayed.

	'''Standard.''' The colors used for the legends and backgrounds on DMSs shall be as provided in [[903.2 Extent of Signing#Table 903.2.20.1 Common Uses of Sign Legend Colors\|Table 903.2.20.1 Common Uses of Sign Legend Colors]] and [[903.2 Extent of Signing#Table 903.2.20.2 Common Uses of Sign Background Colors\|Table 903.2.20.2 Common Uses of Sign Background Colors]].		'''Standard.''' The colors used for the legends and backgrounds on DMSs shall be as provided in [[903.2 Extent of Signing#Table 903.2.12.1 Common Uses of Sign Legend Colors\|Table 903.2.12.1 Common Uses of Sign Legend Colors]] and [[903.2 Extent of Signing#Table 903.2.12.2 Common Uses of Sign Background Colors\|Table 903.2.12.2 Common Uses of Sign Background Colors]].

	====910.3.2.8.2 Message Format====		====910.3.2.8.2 Message Format====

Smithk: updated link

2019-06-05T19:54:21Z

updated link

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	:'''9)''' Approved standard public service messages associated with special campaigns (i.e. work zone awareness week, share the ride) or other public information that improves highway safety and reduces congestion.		:'''9)''' Approved standard public service messages associated with special campaigns (i.e. work zone awareness week, share the ride) or other public information that improves highway safety and reduces congestion.

	:'''10)''' When circumstances exist so that no message regarding safety or traveler information as defined by the previous listed priorities is warranted, Messages and Special Messages as outlined in [[910.3 Dynamic Message Signs (DMS)#910.3.2.16 Driver Safety Campaigns\|EPG 910.3.2.16 Driver Safety Campaigns]] shall be displayed on all DMSs in Missouri. Messages shall be rotated regularly so that a variety of information is displayed to the traveling public. No message shall be excluded from the rotation unless otherwise approved by [http://~~wwwi~~/~~intranet~~/tr/ Traffic] and [http://wwwi/intranet/cr/ Community Relations] staffs.		:'''10)''' When circumstances exist so that no message regarding safety or traveler information as defined by the previous listed priorities is warranted, Messages and Special Messages as outlined in [[910.3 Dynamic Message Signs (DMS)#910.3.2.16 Driver Safety Campaigns\|EPG 910.3.2.16 Driver Safety Campaigns]] shall be displayed on all DMSs in Missouri. Messages shall be rotated regularly so that a variety of information is displayed to the traveling public. No message shall be excluded from the rotation unless otherwise approved by [http://sp/sites/ts/Pages/default.aspx Traffic] and [http://wwwi/intranet/cr/ Community Relations] staffs.

	Sometimes operators are faced with competing message needs when two or more incidents are simultaneously occurring on the freeway system downstream of a DMS. In such situations, operators must decide which of the incidents should be signed for, because it is not normally advisable to sign for both, unless a two-phase message is used. Procedures for posting two-phase messaging and situations that justify it are provided in [[910.3 Dynamic Message Signs (DMS)#910.3.2.14 Use of One-Phase and Two-Phase Messages\|EPG 910.3.2.14 Use of One-Phase and Two-Phase Messages]]. The following priority principles should be used in determining which competing incident should be signed for when a single phase is used:		Sometimes operators are faced with competing message needs when two or more incidents are simultaneously occurring on the freeway system downstream of a DMS. In such situations, operators must decide which of the incidents should be signed for, because it is not normally advisable to sign for both, unless a two-phase message is used. Procedures for posting two-phase messaging and situations that justify it are provided in [[910.3 Dynamic Message Signs (DMS)#910.3.2.14 Use of One-Phase and Two-Phase Messages\|EPG 910.3.2.14 Use of One-Phase and Two-Phase Messages]]. The following priority principles should be used in determining which competing incident should be signed for when a single phase is used:

Smithk: /* 910.3.2.4 Incident Verification */Per TS, replaced archaic “Motorist Assist” with "Emergency Response"

2019-04-29T17:41:05Z

910.3.2.4 Incident Verification: Per TS, replaced archaic “Motorist Assist” with "Emergency Response"

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	===910.3.2.4 Incident Verification===		===910.3.2.4 Incident Verification===

	It is very important that operators verify an incident before posting an incident message on a DMS. The best source of verification is by viewing it with a CCTV camera, but if a CCTV camera view is not available, it must be verified by a reliable source. Examples of reliable sources are ~~Motorist Assist~~ Patrols, law enforcement agencies (i.e., MSHP, local sheriff and police departments) and MoDOT district staff or Construction/ Maintenance field staff. Media sources or the general public are not considered to be reliable sources for incident verification purposes. However, this unreliable information should be useful to operators in identifying information that needs to be explored further. Lines of communication need to be established between the above noted reliable sources and the TMCs.		It is very important that operators verify an incident before posting an incident message on a DMS. The best source of verification is by viewing it with a CCTV camera, but if a CCTV camera view is not available, it must be verified by a reliable source. Examples of reliable sources are Emergency Response Patrols, law enforcement agencies (i.e., MSHP, local sheriff and police departments) and MoDOT district staff or Construction/ Maintenance field staff. Media sources or the general public are not considered to be reliable sources for incident verification purposes. However, this unreliable information should be useful to operators in identifying information that needs to be explored further. Lines of communication need to be established between the above noted reliable sources and the TMCs.

	It is also important that operators continue to monitor and modify, as necessary, the incident message as the incident progresses. Where CCTV camera views are not available, operators need to maintain communication with the reliable sources at the incident scene to ensure that the current message is accurate and timely. Generally when CCTV cameras are not available, operators should attempt to get updated incident information from reliable sources every 15 minutes for incidents within the metropolitan areas controlled by the KC Scout and Gateway Guide TMCs and every 30 minutes for incidents along the I-29, I-35, I-44, I-55, I-57, I-70 and US 60 corridors.		It is also important that operators continue to monitor and modify, as necessary, the incident message as the incident progresses. Where CCTV camera views are not available, operators need to maintain communication with the reliable sources at the incident scene to ensure that the current message is accurate and timely. Generally when CCTV cameras are not available, operators should attempt to get updated incident information from reliable sources every 15 minutes for incidents within the metropolitan areas controlled by the KC Scout and Gateway Guide TMCs and every 30 minutes for incidents along the I-29, I-35, I-44, I-55, I-57, I-70 and US 60 corridors.

Smithk: Per TS, updated guidance. References new types of DMSs.

2019-03-14T15:57:00Z

Per TS, updated guidance. References new types of DMSs.

Show changes

EPGsysop: /* 910.3.2.13.2 Other Weather Messages */

2018-01-11T14:24:03Z

910.3.2.13.2 Other Weather Messages

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	====910.3.2.13.2 Other Weather Messages====		====910.3.2.13.2 Other Weather Messages====
			[[image:910.3.2.13.2.jpg\|right\|245px\|thumb\|'''<Center>Fog</center>''']]
	In addition to winter weather, travel conditions may also be impacted by other weather events such as thunderstorms, significant periods of rain, fog or excessive wind. The following messages should be used when applicable, particularly if a large portion of the corridor is impacted.		In addition to winter weather, travel conditions may also be impacted by other weather events such as thunderstorms, significant periods of rain, fog or excessive wind. The following messages should be used when applicable, particularly if a large portion of the corridor is impacted.

EPGsysop at 19:30, 7 April 2017

2017-04-07T19:30:36Z

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	===910.3.2.2 Responsibility for Operation of DMS===		===910.3.2.2 Responsibility for Operation of DMS===

	The district engineer shall authorize the use of all DMSs, both state and contractor-furnished, and may designate a person or persons to be responsible for the authorization of use, messages to be displayed, and the care, maintenance, and security of the DMSs. Access to the DMS shall only be given to responsible individuals. The district engineer shall ensure that efforts are coordinated ~~such~~ that motorists are informed of the most critical information based on priority of messages listed below. In the Kansas City, St. Louis and Springfield metropolitan areas, Scout, Gateway Guide and Ozarks Traffic TMC operations staffs have been delegated the responsibility to operate the DMSs under their control.		The district engineer shall authorize the use of all DMSs, both state and contractor-furnished, and may designate a person or persons to be responsible for the authorization of use, messages to be displayed, and the care, maintenance, and security of the DMSs. Access to the DMS shall only be given to responsible individuals. The district engineer shall ensure that efforts are coordinated so that motorists are informed of the most critical information based on priority of messages listed below. In the Kansas City, St. Louis and Springfield metropolitan areas, Scout, Gateway Guide and Ozarks Traffic TMC operations staffs have been delegated the responsibility to operate the DMSs under their control.

	The DMSs located on I-29, I-35 and I-70 are operated by the KC Scout TMC on a 24/7 basis with the exception of DMSs on I-70 in the St. Louis District. The Northwest, Northeast and Central Districts have the capability to operate the DMSs within their boundaries, but coordination with the KC Scout TMC is required.		The DMSs located on I-29, I-35 and I-70 are operated by the KC Scout TMC on a 24/7 basis with the exception of DMSs on I-70 in the St. Louis District. The Northwest, Northeast and Central Districts have the capability to operate the DMSs within their boundaries, but coordination with the KC Scout TMC is required.
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	:'''9)''' Approved standard public service messages associated with special campaigns (i.e. work zone awareness week, share the ride) or other public information that improves highway safety and reduces congestion. Approval should be coordinated through the TMCs for participation in such campaigns. Using the [http://wwwi/intranet/cr/documents/DMSMessageRequestForm062909.doc DMS Request Form], messages should be submitted, with suggested input from TMC staff, to [http://wwwi/intranet/cr/ Central Office Community Relations] staff for endorsement. The [[media:910.3.2.3 DMS Message Approval Board Guidelines.doc\|DMS Message Approval Board will follow its own guidelines]] to approve or reject submitted messages.		:'''9)''' Approved standard public service messages associated with special campaigns (i.e. work zone awareness week, share the ride) or other public information that improves highway safety and reduces congestion. Approval should be coordinated through the TMCs for participation in such campaigns. Using the [http://wwwi/intranet/cr/documents/DMSMessageRequestForm062909.doc DMS Request Form], messages should be submitted, with suggested input from TMC staff, to [http://wwwi/intranet/cr/ Central Office Community Relations] staff for endorsement. The [[media:910.3.2.3 DMS Message Approval Board Guidelines.doc\|DMS Message Approval Board will follow its own guidelines]] to approve or reject submitted messages.

	:'''10)''' When circumstances exist ~~such~~ that no message regarding safety or traveler information as defined by the previous listed priorities is warranted, Messages and Special Messages as outlined in [[910.3 Dynamic Message Signs (DMS)#910.3.2.16 Driver Safety Campaigns\|EPG 910.3.2.16 Driver Safety Campaigns]] shall be displayed on all DMSs in Missouri. Messages shall be rotated regularly so that a variety of information is displayed to the traveling public. No message shall be excluded from the rotation unless otherwise approved by [http://wwwi/intranet/tr/ Traffic] and [http://wwwi/intranet/cr/ Community Relations] staffs.		:'''10)''' When circumstances exist so that no message regarding safety or traveler information as defined by the previous listed priorities is warranted, Messages and Special Messages as outlined in [[910.3 Dynamic Message Signs (DMS)#910.3.2.16 Driver Safety Campaigns\|EPG 910.3.2.16 Driver Safety Campaigns]] shall be displayed on all DMSs in Missouri. Messages shall be rotated regularly so that a variety of information is displayed to the traveling public. No message shall be excluded from the rotation unless otherwise approved by [http://wwwi/intranet/tr/ Traffic] and [http://wwwi/intranet/cr/ Community Relations] staffs.

	Sometimes operators are faced with competing message needs when two or more incidents are simultaneously occurring on the freeway system downstream of a DMS. In such situations, operators must decide which of the incidents should be signed for, because it is not normally advisable to sign for both, unless a two-phase message is used. Procedures for posting two-phase messaging and situations that justify it are provided in [[910.3 Dynamic Message Signs (DMS)#910.3.2.14 Use of One-Phase and Two-Phase Messages\|EPG 910.3.2.14 Use of One-Phase and Two-Phase Messages]]. The following priority principles should be used in determining which competing incident should be signed for when a single phase is used:		Sometimes operators are faced with competing message needs when two or more incidents are simultaneously occurring on the freeway system downstream of a DMS. In such situations, operators must decide which of the incidents should be signed for, because it is not normally advisable to sign for both, unless a two-phase message is used. Procedures for posting two-phase messaging and situations that justify it are provided in [[910.3 Dynamic Message Signs (DMS)#910.3.2.14 Use of One-Phase and Two-Phase Messages\|EPG 910.3.2.14 Use of One-Phase and Two-Phase Messages]]. The following priority principles should be used in determining which competing incident should be signed for when a single phase is used:
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	</center>		</center>

	:If conditions are ~~such~~ that more than one scenario applies and/or the roadway needs to be closed, appropriate messages should be coordinated with the Central Office EOC and district management.		:If conditions are so that more than one scenario applies and/or the roadway needs to be closed, appropriate messages should be coordinated with the Central Office EOC and district management.

Smithk: updated links

2014-07-17T18:30:40Z

updated links

← Older revision		Revision as of 13:30, 17 July 2014
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	'''Support.''' Dynamic Message Signs (DMSs) are stationary traffic control devices capable of displaying one or more alternative messages that provide travelers with real-time, traffic-related variable messages. DMSs are used to warn, regulate, route and manage traffic.		'''Support.''' Dynamic Message Signs (DMSs) are stationary traffic control devices capable of displaying one or more alternative messages that provide travelers with real-time, traffic-related variable messages. DMSs are used to warn, regulate, route and manage traffic.

	MoDOT operates DMSs through its transportation management centers (TMCs) in Kansas City ([http://www.kcscout.net/ KC Scout]), St. Louis ([http://www.gatewayguide.com/~~atis/index.html~~ Gateway Guide]) and Springfield ([http://www.ozarkstraffic.info/index.html Ozarks Traffic]). Each of these TMCs operates DMSs within its metropolitan coverage area. The KC Scout and Gateway Guide TMCs also operate DMSs on the statewide rural I-29, I-35, I-44, I-55, I-57, I-70 and US 60.		MoDOT operates DMSs through its transportation management centers (TMCs) in Kansas City ([http://www.kcscout.net/ KC Scout]), St. Louis ([http://www.gatewayguide.com/ Gateway Guide]) and Springfield ([http://www.ozarkstraffic.info/index.html Ozarks Traffic]). Each of these TMCs operates DMSs within its metropolitan coverage area. The KC Scout and Gateway Guide TMCs also operate DMSs on the statewide rural I-29, I-35, I-44, I-55, I-57, I-70 and US 60.

	==910.3.1 National DMS Policy==		==910.3.1 National DMS Policy==
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	\|}		\|}

	::'''For [http://www.gatewayguide.com/~~atis/index.html~~ Gateway Guide]'''		::'''For [http://www.gatewayguide.com/ Gateway Guide]'''
	{\| style="margin: 1em auto 1em auto"		{\| style="margin: 1em auto 1em auto"
	\|-		\|-

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	\|'''Related Information'''		\|'''Related Information'''
	\|-		\|-
	\|[~~http~~://epg.modot.~~mo.gov~~/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 '''Changeable Message Signs (CMS)''']		\|[https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 '''Changeable Message Signs (CMS)''']
	\|}		\|}
	'''Support.''' Dynamic Message Signs (DMSs) are stationary traffic control devices capable of displaying one or more alternative messages that provide travelers with real-time, traffic-related variable messages. DMSs are used to warn, regulate, route and manage traffic.		'''Support.''' Dynamic Message Signs (DMSs) are stationary traffic control devices capable of displaying one or more alternative messages that provide travelers with real-time, traffic-related variable messages. DMSs are used to warn, regulate, route and manage traffic.
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	Districts without a TMC may also serve in a back-up role for their respective corridor in the event that the KC Scout, Gateway Guide or Ozarks Traffic TMCs have other activities in their local metropolitan areas that prevent them from managing operations on the I-29, I-35, I-44, I-55, I-57, I-70 and US 60 corridors.		Districts without a TMC may also serve in a back-up role for their respective corridor in the event that the KC Scout, Gateway Guide or Ozarks Traffic TMCs have other activities in their local metropolitan areas that prevent them from managing operations on the I-29, I-35, I-44, I-55, I-57, I-70 and US 60 corridors.

	===910.3.2.3 [~~http~~://epg.modot.org/index.php?title=903.1_Extent_of_Signing#903.1.14_Changeable.2FDynamic_Message_Signs_.28CMS.2FDMS.29_.28MUTCD_Section_2A.07.29 Message Priorities]===		===910.3.2.3 [https://epg.modot.org/index.php?title=903.1_Extent_of_Signing#903.1.14_Changeable.2FDynamic_Message_Signs_.28CMS.2FDMS.29_.28MUTCD_Section_2A.07.29 Message Priorities]===

	The following message hierarchy determines what type of message has priority should more than one request be made to post a message to the same sign. The DMS messages shall be prioritized in the following order unless overridden by a supervisor:		The following message hierarchy determines what type of message has priority should more than one request be made to post a message to the same sign. The DMS messages shall be prioritized in the following order unless overridden by a supervisor:
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	The safety messages will provide variety and guard against message boredom. Higher priority messages, as provided in [[910.3 Dynamic Message Signs (DMS)#910.3.2.3 Message Priorities\|EPG 910.3.2.3 Message Priorities]], will always override the general messages. Special messages will be placed on the DMSs as needed. [http://sharepoint/systemdelivery/tr/Pages/default.aspx Traffic] staff will regularly monitor the DMS usage.		The safety messages will provide variety and guard against message boredom. Higher priority messages, as provided in [[910.3 Dynamic Message Signs (DMS)#910.3.2.3 Message Priorities\|EPG 910.3.2.3 Message Priorities]], will always override the general messages. Special messages will be placed on the DMSs as needed. [http://sharepoint/systemdelivery/tr/Pages/default.aspx Traffic] staff will regularly monitor the DMS usage.

	===910.3.2.17 On-Site Control of [~~http~~://epg.modot.~~mo.gov~~/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message Signs]===		===910.3.2.17 On-Site Control of [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message Signs]===

	Portable Changeable Message Signs (CMSs) are normally used by MoDOT personnel or contractors to post information regarding construction or maintenance projects. To the maximum extent practicable, CMS messages should follow the provisions of [~~http~~://epg.modot.~~mo.gov~~/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 EPG 616.6.60 Changeable Message Signs (CMSs)].		Portable Changeable Message Signs (CMSs) are normally used by MoDOT personnel or contractors to post information regarding construction or maintenance projects. To the maximum extent practicable, CMS messages should follow the provisions of [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 EPG 616.6.60 Changeable Message Signs (CMSs)].

	Particularly in the Kansas City and St. Louis metropolitan areas, CMSs can be used to supplement the messages posted on the KC Scout and Gateway Guide DMSs. If these CMSs are to be useful in supplementing messages on DMSs, close coordination is needed between the TMC operators and those responsible for operating the CMSs to ensure that the DMSs and CMSs are not located too closely together and that that the messages don’t conflict.		Particularly in the Kansas City and St. Louis metropolitan areas, CMSs can be used to supplement the messages posted on the KC Scout and Gateway Guide DMSs. If these CMSs are to be useful in supplementing messages on DMSs, close coordination is needed between the TMC operators and those responsible for operating the CMSs to ensure that the DMSs and CMSs are not located too closely together and that that the messages don’t conflict.

	[[Category:910 Intelligent Transportation Systems]]		[[Category:910 Intelligent Transportation Systems]]