902.22 Maintenance Guidelines - Revision history

RollerA: /* 902.22.3.3 Emergency Maintenance */

2025-11-25T18:35:45Z

902.22.3.3 Emergency Maintenance

← Older revision		Revision as of 13:35, 25 November 2025
Line 173:		Line 173:

	Generally, flashers have lower priority than traffic signals. Refer to the [http://sp/sites/sm/IRPDocuments/SitePages/IRP%20Home.aspx Incident Response Plan] and [http://sp/sites/sm/IRPDocuments/Shared%20Documents/PUBLISHED/APPENDICES/AppendiceII%20-%20Incident%20Response%20Priorities.pdf Incident Response Priorities] for detailed information regarding emergency response for traffic signals, flashers and lights.		Generally, flashers have lower priority than traffic signals. Refer to the [http://sp/sites/sm/IRPDocuments/SitePages/IRP%20Home.aspx Incident Response Plan] and [http://sp/sites/sm/IRPDocuments/Shared%20Documents/PUBLISHED/APPENDICES/AppendiceII%20-%20Incident%20Response%20Priorities.pdf Incident Response Priorities] for detailed information regarding emergency response for traffic signals, flashers and lights.
	[[~~image~~:902.8.~~3.4~~.jpg\|right\|275px\|thumb\|<center>'''During after-hours, the electrician might have to contact the highway patrol or local police and the power company.'''</center>]]		[[File:Figure 902.22.2.jpg\|right\|275px\|thumb\|<center>'''During after-hours, the electrician might have to contact the highway patrol or local police and the power company.'''</center>]]

	====902.22.3.4 Maintenance Limits ====		====902.22.3.4 Maintenance Limits ====

RollerA: /* 902.22.3.2.2 Cabinet Test Procedures */

2025-11-25T18:34:34Z

902.22.3.2.2 Cabinet Test Procedures

← Older revision		Revision as of 13:34, 25 November 2025
Line 159:		Line 159:
	::For solid-state pre-timed, NEMA TS1 and Type 170/2070 controllers, the monitor harness or harnesses should be tested for continuity and to ensure that all wiring to the monitor is intact and that the correct load switch circuit goes to the correct channel in the conflict monitor. The results of the test are recorded on the Conflict Monitor Continuity Checklist.		::For solid-state pre-timed, NEMA TS1 and Type 170/2070 controllers, the monitor harness or harnesses should be tested for continuity and to ensure that all wiring to the monitor is intact and that the correct load switch circuit goes to the correct channel in the conflict monitor. The results of the test are recorded on the Conflict Monitor Continuity Checklist.

	[[~~image~~:~~902.8.3.2.2~~ Conflict Monitor Continuity Checklist.gif\|center\|frame\|<center>'''Conflict Monitor Continuity Checklist'''</center>]]		[[File:Conflict Monitor Continuity Checklist.gif\|center\|frame\|<center>'''Conflict Monitor Continuity Checklist'''</center>]]


	:'''Conflict Monitor Continuity Checklist'''		:'''Conflict Monitor Continuity Checklist'''

RollerA: /* 902.22.3 Signal Maintenance */

2025-11-25T18:32:45Z

902.22.3 Signal Maintenance

← Older revision		Revision as of 13:32, 25 November 2025
Line 64:		Line 64:
	'''Guidance. '''If a traffic signal is dark for signal maintenance, consideration should be given to notifying the police agency whose jurisdiction the signal is located in. If the signal can be flashed instead of dark, a request for police assistance might not be necessary unless the time of day, traffic volumes and congestion dictate a need.		'''Guidance. '''If a traffic signal is dark for signal maintenance, consideration should be given to notifying the police agency whose jurisdiction the signal is located in. If the signal can be flashed instead of dark, a request for police assistance might not be necessary unless the time of day, traffic volumes and congestion dictate a need.

	[[File:902.8.3.jpg\|250px\|left]]		[[File:Figure 902.22.1.jpg\|250px\|left]]


	If it is necessary to turn the signal off or a malfunction occurs and traffic cannot be handled by a flashing operation or stop signs cannot be installed immediately, the police should be notified that their assistance is requested until the signal can be repaired or stop signs can be installed.		If it is necessary to turn the signal off or a malfunction occurs and traffic cannot be handled by a flashing operation or stop signs cannot be installed immediately, the police should be notified that their assistance is requested until the signal can be repaired or stop signs can be installed.

WilkeJ at 15:54, 12 November 2025

2025-11-12T15:54:36Z

← Older revision		Revision as of 10:54, 12 November 2025
Line 283:		Line 283:
	\|[[media:902.5.8.3.1 checklist.xlsx\|Statewide Signal/Lighting/Flasher Preventive Maintenance Checklist]]		\|[[media:902.5.8.3.1 checklist.xlsx\|Statewide Signal/Lighting/Flasher Preventive Maintenance Checklist]]
	\|}		\|}
	:There is a [https://epg.modot.org/forms/general_files/TS/902.5.8.3.1_checklist.xlsx\| checklist available for preventive maintenance]: PM Checklist for Signal Supports, Heads, Pull Boxes, and Cabinet and Control Equipment. The list contains a number of items relating to the intersection operation that shall be examined on a periodic basis in accordance with the recommended guidelines set forth herein. Each item on the list shall be examined during the PM check. A check opposite of each individual item indicates that item has been examined and found in proper operating and physical condition. On completion, the PM checklist shall be returned to the signal shop for review and subsequently placed in the signal maintenance file for that particular intersection.		:There is a [https://epg.modot.org/forms/general_files/TS/902.5.8.3.1_checklist.xlsx checklist available for preventive maintenance]: PM Checklist for Signal Supports, Heads, Pull Boxes, and Cabinet and Control Equipment. The list contains a number of items relating to the intersection operation that shall be examined on a periodic basis in accordance with the recommended guidelines set forth herein. Each item on the list shall be examined during the PM check. A check opposite of each individual item indicates that item has been examined and found in proper operating and physical condition. On completion, the PM checklist shall be returned to the signal shop for review and subsequently placed in the signal maintenance file for that particular intersection.

	:6. Emergency Signal Maintenance Work Records		:6. Emergency Signal Maintenance Work Records

WilkeJ: /* 902.22.4 Record Keeping */

2025-11-12T15:52:11Z

902.22.4 Record Keeping

← Older revision		Revision as of 10:52, 12 November 2025
Line 283:		Line 283:
	\|[[media:902.5.8.3.1 checklist.xlsx\|Statewide Signal/Lighting/Flasher Preventive Maintenance Checklist]]		\|[[media:902.5.8.3.1 checklist.xlsx\|Statewide Signal/Lighting/Flasher Preventive Maintenance Checklist]]
	\|}		\|}
	:There is a [~~[media~~:902.5.8.3.~~1 checklist~~.xlsx\|checklist available for preventive maintenance]]: PM Checklist for Signal Supports, Heads, Pull Boxes, and Cabinet and Control Equipment. The list contains a number of items relating to the intersection operation that shall be examined on a periodic basis in accordance with the recommended guidelines set forth herein. Each item on the list shall be examined during the PM check. A check opposite of each individual item indicates that item has been examined and found in proper operating and physical condition. On completion, the PM checklist shall be returned to the signal shop for review and subsequently placed in the signal maintenance file for that particular intersection.		:There is a [https://epg.modot.org/forms/general_files/TS/902.5.8.3.1_checklist.xlsx\| checklist available for preventive maintenance]: PM Checklist for Signal Supports, Heads, Pull Boxes, and Cabinet and Control Equipment. The list contains a number of items relating to the intersection operation that shall be examined on a periodic basis in accordance with the recommended guidelines set forth herein. Each item on the list shall be examined during the PM check. A check opposite of each individual item indicates that item has been examined and found in proper operating and physical condition. On completion, the PM checklist shall be returned to the signal shop for review and subsequently placed in the signal maintenance file for that particular intersection.

	:6. Emergency Signal Maintenance Work Records		:6. Emergency Signal Maintenance Work Records

WilkeJ: /* 902.22.3.1 Preventive Maintenance */

2025-11-12T15:47:40Z

902.22.3.1 Preventive Maintenance

← Older revision		Revision as of 10:47, 12 November 2025
Line 83:		Line 83:
	*'''Review of previous inspection reports'''		*'''Review of previous inspection reports'''
	:Traffic signals that might have structures or features nearing the end of their life cycle might need more frequent inspections to help determine and prioritize replacement needs. The type of signal structure, vulnerability to accident damage and exposure to extreme weather might also be cause for more frequent inspections. Signals needing this additional focus can be identified through review of any concerns noted on previous preventive maintenance inspection reports and should be considered for inclusion in the preventive maintenance inspection schedule.		:Traffic signals that might have structures or features nearing the end of their life cycle might need more frequent inspections to help determine and prioritize replacement needs. The type of signal structure, vulnerability to accident damage and exposure to extreme weather might also be cause for more frequent inspections. Signals needing this additional focus can be identified through review of any concerns noted on previous preventive maintenance inspection reports and should be considered for inclusion in the preventive maintenance inspection schedule.
	Reports in checklist format are available to aid the preventive maintenance process for cabinet and control equipment and for signal supports, signal heads and pull boxes. More detailed preventive maintenance guidance can often be found in the manufacturer’s equipment manuals for the many varied components of signal structures and control.		Reports in [https://epg.modot.org/forms/general_files/TS/902.5.8.3.1_checklist.xlsx checklist] format are available to aid the preventive maintenance process for cabinet and control equipment and for signal supports, signal heads and pull boxes. More detailed preventive maintenance guidance can often be found in the manufacturer’s equipment manuals for the many varied components of signal structures and control.

	A preventive maintenance program should include the following:		A preventive maintenance program should include the following:

WilkeJ: /* 902.22.3 Signal Maintenance */

2025-11-11T20:06:39Z

902.22.3 Signal Maintenance

← Older revision		Revision as of 15:06, 11 November 2025
Line 59:		Line 59:
	==902.22.3 Signal Maintenance==		==902.22.3 Signal Maintenance==
	'''Support. '''Traffic signal maintenance activities can be divided into three major areas: preventive maintenance, emergency repairs, and follow-up work. Signal maintenance personnel are responsible for these tasks.		'''Support. '''Traffic signal maintenance activities can be divided into three major areas: preventive maintenance, emergency repairs, and follow-up work. Signal maintenance personnel are responsible for these tasks.

			See [[902.1 General (MUTCD Chapter 4A)#902.1.10\|EPG 902.1.10]] for MUTCD content regarding traffic signal maintenance.

	'''Guidance. '''If a traffic signal is dark for signal maintenance, consideration should be given to notifying the police agency whose jurisdiction the signal is located in. If the signal can be flashed instead of dark, a request for police assistance might not be necessary unless the time of day, traffic volumes and congestion dictate a need.		'''Guidance. '''If a traffic signal is dark for signal maintenance, consideration should be given to notifying the police agency whose jurisdiction the signal is located in. If the signal can be flashed instead of dark, a request for police assistance might not be necessary unless the time of day, traffic volumes and congestion dictate a need.

WilkeJ: /* 902.22.1.2 | Approved Product List and Equipment Evaluations */

2025-10-31T18:36:23Z

902.22.1.2 | Approved Product List and Equipment Evaluations

← Older revision		Revision as of 13:36, 31 October 2025
Line 9:		Line 9:
	'''Support.''' Controllers replaced under this replacement program do not automatically generate a need to modify ADA-related pedestrian accommodations. However, some controller replacements will lead to a need for such changes. For more information on this subject, see [[642.4 Impact of the Project Category on ADA\|EPG 642.4 Impact of the Project Category on ADA]].		'''Support.''' Controllers replaced under this replacement program do not automatically generate a need to modify ADA-related pedestrian accommodations. However, some controller replacements will lead to a need for such changes. For more information on this subject, see [[642.4 Impact of the Project Category on ADA\|EPG 642.4 Impact of the Project Category on ADA]].

	===902.22.1.2 [https://www.modot.org/traffic \| Approved Product List] and Equipment Evaluations===		===902.22.1.2 [https://www.modot.org/traffic Approved Product List] and Equipment Evaluations===

	'''Support.''' MoDOT has developed an Approved Products List (APL) containing many items used in signals and lighting. The APL is based on equipment that meets department specifications and has been tested for a specified test period with satisfactory performance. This list helps MoDOT purchase reliable products for traffic signals and highway lighting. This list is included in the bid requests for applicable equipment purchases and is also included in construction contracts that include signals or lighting.		'''Support.''' MoDOT has developed an Approved Products List (APL) containing many items used in signals and lighting. The APL is based on equipment that meets department specifications and has been tested for a specified test period with satisfactory performance. This list helps MoDOT purchase reliable products for traffic signals and highway lighting. This list is included in the bid requests for applicable equipment purchases and is also included in construction contracts that include signals or lighting.

WilkeJ: /* 902.22.1.2 Approved Product List and Equipment Evaluations */

2025-10-31T18:35:29Z

902.22.1.2 Approved Product List and Equipment Evaluations

← Older revision		Revision as of 13:35, 31 October 2025
Line 9:		Line 9:
	'''Support.''' Controllers replaced under this replacement program do not automatically generate a need to modify ADA-related pedestrian accommodations. However, some controller replacements will lead to a need for such changes. For more information on this subject, see [[642.4 Impact of the Project Category on ADA\|EPG 642.4 Impact of the Project Category on ADA]].		'''Support.''' Controllers replaced under this replacement program do not automatically generate a need to modify ADA-related pedestrian accommodations. However, some controller replacements will lead to a need for such changes. For more information on this subject, see [[642.4 Impact of the Project Category on ADA\|EPG 642.4 Impact of the Project Category on ADA]].

	===902.22.1.2 [https://www.modot.org/traffic\| Approved Product List] and Equipment Evaluations===		===902.22.1.2 [https://www.modot.org/traffic \| Approved Product List] and Equipment Evaluations===

	'''Support.''' MoDOT has developed an Approved Products List (APL) containing many items used in signals and lighting. The APL is based on equipment that meets department specifications and has been tested for a specified test period with satisfactory performance. This list helps MoDOT purchase reliable products for traffic signals and highway lighting. This list is included in the bid requests for applicable equipment purchases and is also included in construction contracts that include signals or lighting.		'''Support.''' MoDOT has developed an Approved Products List (APL) containing many items used in signals and lighting. The APL is based on equipment that meets department specifications and has been tested for a specified test period with satisfactory performance. This list helps MoDOT purchase reliable products for traffic signals and highway lighting. This list is included in the bid requests for applicable equipment purchases and is also included in construction contracts that include signals or lighting.

WilkeJ: /* 902.22.1.2 [https://www.modot.org/traffic] and Equipment Evaluations */

2025-10-31T18:34:43Z

902.22.1.2 [https://www.modot.org/traffic] and Equipment Evaluations

← Older revision		Revision as of 13:34, 31 October 2025
Line 9:		Line 9:
	'''Support.''' Controllers replaced under this replacement program do not automatically generate a need to modify ADA-related pedestrian accommodations. However, some controller replacements will lead to a need for such changes. For more information on this subject, see [[642.4 Impact of the Project Category on ADA\|EPG 642.4 Impact of the Project Category on ADA]].		'''Support.''' Controllers replaced under this replacement program do not automatically generate a need to modify ADA-related pedestrian accommodations. However, some controller replacements will lead to a need for such changes. For more information on this subject, see [[642.4 Impact of the Project Category on ADA\|EPG 642.4 Impact of the Project Category on ADA]].

	===902.22.1.2 [https://www.modot.org/traffic] and Equipment Evaluations===		===902.22.1.2 [https://www.modot.org/traffic\| Approved Product List] and Equipment Evaluations===

	'''Support.''' MoDOT has developed an Approved Products List (APL) containing many items used in signals and lighting. The APL is based on equipment that meets department specifications and has been tested for a specified test period with satisfactory performance. This list helps MoDOT purchase reliable products for traffic signals and highway lighting. This list is included in the bid requests for applicable equipment purchases and is also included in construction contracts that include signals or lighting.		'''Support.''' MoDOT has developed an Approved Products List (APL) containing many items used in signals and lighting. The APL is based on equipment that meets department specifications and has been tested for a specified test period with satisfactory performance. This list helps MoDOT purchase reliable products for traffic signals and highway lighting. This list is included in the bid requests for applicable equipment purchases and is also included in construction contracts that include signals or lighting.