Image of a Length of Work Sign (G20-1)
 LENGTH OF WORK SIGN (G20-1)
The Length of Work Sign (G20-1) shall be authorized for use at the beginning of any major road construction or maintenance job of more than 2 miles in length, where traffic is maintained through the job.
Image of a Road Work To Begin Next Week Sign (G20-1-2)
 ROAD WORK TO BEGIN NEXT WEEK SIGN (G20-1-2)
The Road Work To Begin Next Week Sign (G20-1-2) may be used to alert drivers that a construction or maintenance activity will begin the following week.

When used the G20-1-2 sign may be placed at the beginning of the applicable section of the roadway on which the project or activity will take place.
Image of a End Road Work Sign (G20-2)
 END ROAD WORK SIGN (G20-2)
The End Road Work Sign (G20-2) shall be authorized for use approximately 500 feet beyond the end of a major construction or maintenance job to indicate the limit of any restrictions or special precautions that have been imposed.
Image of a Pilot Car Sign (G20-4) sign
 PILOT CAR SIGN (G20-4)
(a) Justification.  The Pilot Car Sign (G20-4) will be authorized for use on the back of a vehicle used for guiding one-way traffic through or around a road construction or maintenance project.  It shall be used in conjunction with at least two flagmen.

(b) Placement.  The G20-4 sign shall be mounted in a conspicuous position on the rear of the pilot vehicle.
Image of a Turning Vehicles — Wait for Pilot Car Sign (G20-4-1)
 TURNING VEHICLES — WAIT FOR PILOT CAR SIGN (G20-4-1)
(a) Justification.  The Turning Vehicles — Wait for Pilot Car Sign (G20-4-1) is authorized for use on side road approaches to a work area where a pilot car is being used.

(b) Placement.  When used, the G20-4-1 sign shall be positioned in the vicinity of the stop sign, or if none, immediately in advance of the intersection and facing the traffic on the side road.
Image of a Work Zone Plaque (G20-5AP)
 WORK ZONE PLAQUE (G20-5AP)
A Work Zone Plaque (G20-5AP) may be mounted above a Speed Limit sign to emphasize that a reduced speed limit is in effect within a temporary traffic control zone.
Image of a Detour Follow Red Arrow Sign (G20-6)
 DETOUR FOLLOW RED ARROW SIGN (G20-6)
(a) Justification.  The Detour Follow Red Arrow Sign (G20-6) may be used at a point where a detour has been established on an unnumbered highway and the Red Arrow (G20-6-1) is used to mark the detour.  The Red Arrow (G20-6-1) shall be mounted next to the word "FOLLOW" to indicate the direction of the detour.

Another color is authorized for use where two or more detours overlap.

(b) Placement.  When used, the G20-6 sign should normally be mounted below or next to the Road Closed Sign (R11-2) or the Road Closed — Local Traffic Only Sign (R11-3A).
Image of a Detour Follow Red Arrow Sign (G20-6)
 RED ARROW SIGN (G20-6-1)
(a) Justification.  The Red Arrow Sign (G20-6-1) may be used to mark a detour where the Detour Follow Red Arrow Sign (G20-6) is used.  Another color is authorized where two or more detours overlap.

(b) Placement.  This sign shall be mounted next to the word "FOLLOW" and indicate the direction of the detour.
Image of a Crossover (__) Feet Sign (G20-15)
 CROSSOVER (__) FEET SIGN (G20-15)
The Crossover (__) Feet Sign (G20-15) may be used in work areas to advise drivers of median crossovers.  The sign should be installed approximately 500 feet to 1000 feet in advance of the crossover.
Image of a Maintain Safe Distance Between Vehicles Sign (G20-16)
 MAINTAIN SAFE DISTANCE BETWEEN VEHICLES SIGN (G20-16)
The Maintain Safe Distance Between Vehicles Sign (G20-16) may be used in construction zones where it may be necessary to alert motorists they may be approaching slow-moving or stopped traffic.  The G20-16 sign should be placed in addition to the required advance warning signs in construction areas prone to high traffic volumes, significant delays, or long queues.
Image of a Single Lane Next (__) Miles Sign (G20-17)
 SINGLE LANE NEXT (__) MILES SIGN (G20-17)
The Single Lane Next (__) Miles Sign (G20-17) shall be authorized for use on any long term construction or maintenance project on a multi-lane highway where the project is greater than 1 mile in length.  The G20-17 sign shall be placed throughout the project where traffic is reduced to a single lane in one or both directions.
Image of a Emergency Pull-Off (__) Sign (G30-1)
 EMERGENCY PULL-OFF (__) SIGN (G30-1)
The Emergency Pull-Off (__) Sign (G30-1) may be used in a area to advise drivers of the location of emergency pull-offs.  This sign should be installed approximately 1300 feet in advance of the pull-off.  The actual distance, based on field conditions, should be shown on the sign.
Image of a Emergency Pull-Off Entrance Sign (G30-2)
 EMERGENCY PULL-OFF ENTRANCE SIGN (G30-2)
The Emergency Pull-Off Entrance Sign (G30-2) may be used in a work zone to advise drivers of the location of emergency pull-offs.  This sign should be installed approximately 50 feet in advance of the pull-off.
Image of a Temporary Arrow Sign (G40-1)
 TEMPORARY ARROW SIGN (G40-1)
(a) Justification.  The Temporary Arrow Sign (G40-1) may be used at construction, maintenance, and utility work areas on multi-lane highways to direct traffic around work areas within the roadway.

(b) Placement.  The G40-1 sign may be erected on a Type III Barricade or, when used with the Striped Panel Sign (G40-2) may be mounted on a vehicle.  The demountable arrowhead can be positioned to indicate the direction of traffic flow.  The entire sign face shall be removed or covered while in transit.

(c) Size.  The standard size G40-1 sign shall be 96 inches x 48 inches, except the 72 inches x 36 inches size may be used when the sign is on a pickup truck or similar size vehicle, or on a Type III Barricade.
Image of a Striped Panel Sign (G40-2)
 STRIPED PANEL SIGN (G40-2)
(a) Justification.  The Striped Panel Sign (G40-2) will be authorized for use on a vehicle when used in conjunction with the Temporary Arrow Sign (G40-1).

(b) Placement.  The G40-2 sign shall be placed beneath the Temporary Arrow Sign (G40-1) when mounted on a vehicle.

(c) Size.  The G40-2 sign shall be the same size as the G40-1 sign which is being used.
Image of a Road Work Info Tune Radio To (__) AM Sign (G60-1) ROAD WORK INFO TUNE RADIO TO (__) AM (G60-1)
The Road Work Info Tune Radio To (__) AM Sign (G60-1) may be used in work areas to advise drivers to tune their radio to a specific radio station to receive information concerning the work area.  The G60-1 sign be placed according to the field conditions where space permits.
Image of a Urgent Message When Flashing Sign (G60-1A) URGENT MESSAGE WHEN FLASHING SIGN (G60-1A)
The Urgent Message When Flashing Sign (G60-1A) may be used in conjunction with the Road Work Info Tune Radio To (___) AM Sign (G60-1) and yellow flashing lights.  The Urgent Message When Flashing Sign (G60-1A) may be used to indicate when an urgent message is being transmitted over the highway advisory radio.
Image of a Use Both Lanes To Merge Point Sign (G70-1) USE BOTH LANES TO MERGE POINT SIGN (G70-1)
The Use Both Lanes To Merge Point Sign (G70-1) may be used advance of a temporary lane closure on a freeway, expressway, or other multi-lane highway to inform drivers that they may approach the merge point in either lane.  The sign is used in areas where significant queues are anticipated to occur at frequent intervals.  When used, it should generally be positioned in advance of the maximum expected queue.  This sign is always used in combination with the Merge Here Take Your Turn Sign (G70-2).
Image of a Merge Here Take Your Turn Sign (G70-2) MERGE HERE TAKE YOUR TURN SIGN (G70-2)
The Merge Here Take Your Turn Sign (G70-2) may be used at the point of a temporary lane closure on a freeway, expressway, or other multi-lane highway where drivers are expected to merge into a single lane.  This sign is always used in combination with the Use Both Lane To Merge Point Sign (G70-1).