ROAD WORK NEXT XX MILES Sign (G20-1): What It Means

ROAD WORK NEXT XX MILES (G20-1), shown with an example distance. Illustration drawn by Safe Pass Traffic; not to scale.

The orange rectangular ROAD WORK NEXT XX MILES sign (G20-1) tells you how long a work zone is: for the stated number of miles, expect work activity, changing lanes and other temporary conditions.

What it means

Section 6H.35 of the California MUTCD 2026 Edition says the G20-1 should be installed in advance of work zones that are more than 2 miles long. It may also be used for shorter zones. The distance shown shall be stated to the nearest whole mile.

Unlike the diamond ROAD WORK AHEAD (W20-1) sign, which warns that work is coming, the G20-1 is a guide-style rectangle that tells you the extent of the zone.

What drivers often get wrong

Thinking the work is continuous. The sign covers the whole stretch, but active work may be in one or several spots within it.
Relaxing after the first work area. Other lane closures, flaggers or shoulder work can appear anywhere within the posted miles.
Assuming fines always double. Under CVC 42009, doubled fines for listed offenses apply in a highway construction or maintenance area when traffic is regulated or restricted under CVC 21367, or when work is actually being performed by workers; some provisions apply only when workers are present and signs notify motorists of them. See double fines work zone signs.

Where it goes in a work zone

The G20-1 goes in advance of the work zone, at the start of the stretch it describes. Section 6H.35 says it may be mounted on a Type 3 barricade.

Other signs are used inside the zone as needed. For example, Section 6H.22 notes that shoulder work signs may be used alone or with ROAD WORK NEXT XX MILES. At the far end, END ROAD WORK (G20-2) may mark where the zone finishes.

What contractors need to know

Use it on zones over 2 miles; consider it on shorter zones where it helps drivers understand the extent of the work.
Round the distance to the nearest whole mile, and update it if the zone limits change.
It does not replace the advance warning series; specific signs are still needed for each lane closure, flagging station or shoulder closure.
Long corridor projects often combine the G20-1 with portable changeable message signs; the permitting agency may require specific signs through its permit.
A traffic control plan shows where the zone begins and ends so the posted distance matches.

Related signs

Frequently asked questions

When is a ROAD WORK NEXT XX MILES sign required?

The CA MUTCD says it should be installed in advance of work zones more than 2 miles long, and it may be used on shorter zones. Agencies may set their own requirements in permits.

Can the sign show half miles?

No. The manual says the distance shall be stated to the nearest whole mile.

Is ROAD WORK NEXT XX MILES the same as ROAD WORK AHEAD?

No. ROAD WORK AHEAD (W20-1) is a diamond warning sign that work is coming. ROAD WORK NEXT XX MILES (G20-1) is a rectangle that states how long the work zone is.

Sources

Need this sign on a traffic control plan?

Safe Pass Traffic prepares PE & TE stamped traffic control plans, striping plans and typical plans for projects statewide in California, and helps with the permit submittal. We draw the plan that shows which signs go where; your contractor or traffic control provider sets them in the field. Call or text (714) 362-1348 or request a quote.