MUTCD/Michigan/W

Series W of the MMUTCD is for warning signs. The following tables display only the signs specific to the MMUTCD in Michigan; consult MUTCD/W for warning signs in the national standard.

Work zone usage

This series includes temporary traffic control warning signs for use in work zones (construction zones). Whereas a regulatory sign appears the same inside and outside a work zone, a warning sign has an orange background instead of the usual yellow when used in a work zone.

W3-4b
Warning use
Work zone use

In general, OpenStreetMap only maps long-term closures and construction sites. For routing purposes, short-term construction is more reliably and efficiently tracked in incident management systems along with real-time traffic congestion data. However, if a temporary sign happens to be posted on a long-term basis for some reason, you can map it as you would map a normal sign. If you map the work zone use traffic sign as a node, use a W code but add colour=orange to the node.

W1: Curves and Turns‎‎

Sign or plaque	Designation	Name	Tags	Notes
	W1-2bR	Two Lane Curve Sign (right)
	W1-2bL	Two Lane Curve Sign (left)

W3: Advance Traffic Control‎

Sign or plaque	Designation	Name	Tags	Notes
	W3-4b	Prepare to Stop When Flashing
	W3-5a	XX mph Speed Zone Ahead
	W3-5b	Reduced Speed Zone Ahead

W6: Divided Highways

Sign or plaque	Designation	Name	Tags	Notes
	W6-5	Triple Arrow

W8: Pavement and Roadway Conditions‎

Sign or plaque	Designation	Name	Tags	Notes
	W8-26	Rumble Strips Ahead

W9: Lane Transitions‎

Sign or plaque	Designation	Name	Tags	Notes
	W9-3a	Center & Left Lane Closed Ahead
	W9-3b	Center & Left 2 Lanes Closed Ahead

W11: Advance Warnings and Crossings‎

Sign or plaque	Designation	Name	Tags	Notes
	W11-10a	Truck Crossing Text
	W11-10b	Factory Entrance
	W11-20a	Elk Crossing Text
	W11-21a	Moose Crossing Text
	W11-23	ATV Symbol
	W11-24	Watch for Ramp Traffic

W12: Low Clearance‎

Sign or plaque	Designation	Name	Tags	Notes
	W12-2aP	Low Clearance (plaque)
	W12-3	Vertical Underclearance
	W12-3a	Vertical Underclearance with Arrow

W13: Advisory Speeds‎

Designation	Name	Tags	Notes
W13-3c	Rest Area Advisory Speed	`maxspeed:advisory=15 mph` on the ramps and the service roads within the rest area `highway=rest_area` nearby
W13-3d	Weigh Station Maximum and Minimum Speed	`maxspeed:advisory=` `minspeed:advisory=` on the ramps and the service roads within the weigh station `amenity=vehicle_inspection` around the weigh station `amenity=weighbridge` at the truck scales	Speculative
W13-6a	Exit Advisory Speed 180 Degrees	`maxspeed:advisory=25 mph` `hazard=curve` `curve=hairpin` on the ramp `highway=motorway_junction` at the beginning of the ramp
W13-7a	Ramp Advisory Speed 180 Degrees	`maxspeed:advisory=25 mph` `hazard=curve` `curve=hairpin` on the ramp

W14: Dead End Streets and No Passing Zones‎

Sign or plaque	Designation	Name	Tags	Notes
	W14-2b	Road Ends

W16: Supplemental

Sign or plaque	Designation	Name	Tags	Notes
	W16-4aP	Next X Miles (two lines, plaque)
	W16-4bP	Next X Miles (one line, plaque)
	W16-4cP	Next XXX ft (plaque)
	W16-7P(R)	Angled-Down Arrow (plaque)
	W16-7P(L)	Angled-Down Arrow (plaque)
	W16-8P	Road Name (plaque)
	W16-8aP	Double Road Name (plaque)
	W16-17P	Roundabout (plaque)
	W16-19	Exit Advisory Speed Advance Turn
	W16-20P	Closed Foldable Sign (Freeway)
	W16-21P	Closed Foldable Sign (Freeway)
	W16-22P	Closed Foldable Sign (Non-freeway)

W19: End of Controlled Access Highway

Sign or plaque	Designation	Name	Tags	Notes
	W19-1	Freeway Ends 1 Mile

W20: Work Zones

Sign or plaque	Designation	Name	Tags	Notes
	W20-4c	Watch For Emergency Vehicles
	W20-7a	Traffic Regulator Symbol
	W20-8	Sidewalk Closed Ahead
	W20-9	Crossover Closed/Use Next Crossover
	W20-10	Concrete Curing
	W20-11	Temp Bus Stop
	W20-12P	Road Name (above M4-8a and M4-9 series)
	W20-13P	Road Name (below 48" diamond)
	W20-14	Late Merge
	W20-14aP	Take Turns
	W20-14bP	Left Lane
	W20-15	Stay in Your Lane
	W20-15a	Prepare for Backups
	W20-15b	Watch for Traffic Backups Be Prepared to Stop
	W20-16	Truck Entering & Exiting Roadway
	W20-17	Exit Open Ahead
	W20-18	Emergency Pull Off Area 1/2 Mile
	W20-18a	Emergency Pull Off Area 500 Feet