Pilot Car Requirements: When Oversize Loads Need an Escort

A pilot car, also called an escort vehicle, travels with an oversize load to warn other drivers and to warn the truck driver. It shows the public that something big is coming. It tells the driver about hazards before the load reaches them.

States require escorts because a wide, tall or long load takes up more road than traffic expects. It may cross the center line on a narrow bridge or meet a low wire the driver cannot judge from the cab.

Escort rules are set by each state, and they differ a lot. Federal rules set the standard width on the National Network at 102 inches, and FHWA notes there is no federal height limit. The escort rules for anything over those standard sizes come from the state that issues the permit. This guide uses Texas, Washington and New York as examples. Always check the rules of every state on your route.

The job of a pilot car

A front escort, often called the lead car, looks ahead. Washington's escort rule lists what it watches for: road surface hazards, overhead clearances, obstructions, traffic congestion and pedestrians. It warns oncoming traffic, guides the load through lane changes and turns, and stops traffic before a narrow structure the load must clear first.

A rear escort, often called the chase car, warns traffic coming up from behind. It watches for anything coming loose from the load, flat tires, fast traffic and vehicles trying to pass. When traffic builds up behind the load, it helps the load pull over so others can get by.

Texas says the escort must warn the public when the load has to cross the center line of a narrow bridge or road, turn into the opposing lanes, slow down for a low overhead obstruction or a bridge, or otherwise create an unusual traffic pattern.

What triggers an escort requirement

Four things usually trigger an escort: width, height, length and overhang. Each state sets its own figures. Many states also set different figures for two-lane roads and multilane highways.

Here is how three states compare.

First escort, width. Texas: over 14 ft to 16 ft, one escort. Washington: over 11 ft on two-lane roads, front and rear; over 14 ft on multilane, one rear. New York: at 12 ft 1 in, one escort.
Front and rear, width. Texas: over 16 ft. Washington: over 20 ft on multilane undivided highways. New York: at 16 ft.
Height pole escort. Texas: over 17 ft. Washington: over 14 ft 6 in. New York: at 14 ft.
Length. Texas: over 110 ft, one escort; over 125 ft, two. Washington: over 105 ft on two-lane roads and over 125 ft on multilane, a rear escort. New York: at 80 ft, one escort; at 100 ft, front and rear.

Overhang has its own triggers. In Washington, a front overhang of more than 20 ft needs a front escort on two-lane roads. In New York, a rear overhang of more than 10 ft needs a following escort.

States also keep room to ask for more. Washington may require an escort whenever it decides one is needed to protect the public. TxDMV may add law enforcement escorts. New York's guidelines say actual permit requirements may differ based on engineering judgment.

The height pole

A height pole is mounted on the front of the lead car and set a little higher than the load. If it touches a wire, sign or bridge, the lead car warns the driver before the load gets there.

The height that calls for a pole varies widely. From the table above: New York at 14 ft, Washington over 14 ft 6 in, and Texas over 17 ft. In Washington the pole goes on the front escort on all highways, and the rule says the pole must be nonconductive and flexible at the top so it does not damage wires or lights. In Texas, a load over 18 ft high needs front and rear escorts, and the front car still carries the pole.

Night, two-lane roads and cities

Two-lane roads. On a two-lane road, oncoming traffic is the main danger, so the single escort usually goes in front. Texas puts a single width escort in front on two-lane highways and at the rear on multilane highways. New York does the same: leading on two-lane roads, following on multilane. Washington goes further and requires front and rear escorts on two-lane roads once a load is over 11 ft wide.

The figure below shows where the single escort rides in each case.

Texas and New York place a single width escort by road type: in front on two-lane roads, where oncoming traffic is the main danger, and at the rear on multilane highways, where the escort warns traffic coming up from behind. Washington requires front and rear escorts on two-lane roads once a load is over 11 ft wide. Travel is left to right.

Night. Most oversize moves are daylight only. In New York, travel is daylight only on weekdays, with no night travel unless the permit says so, and the state requires a police escort for night moves outside NYSDOT Regions 8 and 10. In Washington, night movement is allowed only when the permit states "Night movement approved". Loads up to 12 ft wide, 14 ft 6 in high and 105 ft long are exempt from that night limit.

Cities and rush hour. In New York, loads 14 ft or more wide or high, or 90 ft or more long, may not move through business districts from 7 to 9 a.m. and 4 to 6 p.m. Loads 16 ft wide, 15 ft high or 100 ft long face the same hours statewide. Washington publishes commuter-hour curfews for specific highway sections with the permit.

What the escort driver needs

Certification. Some states require the escort driver to be certified. Washington requires a valid pilot/escort operator certificate, carried while on duty. Drivers licensed in other states can use a certification from another jurisdiction that Washington approves. WSDOT lists the states whose programs it recognizes: Arizona, Colorado, Georgia, Minnesota, North Carolina, Oklahoma, Utah and Virginia. New York's escort triggers call for a certified escort. Texas requires training only for escort flaggers who direct traffic, not for escort drivers who do not, and it accepts training that another state accepts.

Equipment. The exact list depends on the state, but the same items come up again and again:

An "OVERSIZE LOAD" sign, shown only while escorting
Amber flashing or rotating lights on the roof
Two-way radio contact with the truck and any other escort
A height pole when the permit requires one
Safety gear for work outside the vehicle, such as a stop and slow paddle, warning triangles and a high-visibility vest

Texas and Washington both set rules for sign size, sign placement and lights. Check them before you buy or mount anything.

How to read the escort line on a permit

The state rules tell you what usually triggers an escort. Your permit tells you what this move needs.

Look for four things in the escort section:

How many. One, two or more escorts, and whether law enforcement must ride along.
Where. Front, rear or both. The position may change by road type, as in Texas and New York.
Which stretch. Some escorts are needed only on certain roads, such as two-lane sections or a city segment.
What equipment. A height pole, a flagger or a route survey.

In Washington, the escort must carry a copy of a single-trip permit that shows routing, with all its conditions and attachments. Before you leave, agree on the route, each car's position and the radio channel.

Common mistakes

Using one state's rules for the whole trip. A load that needs no escort in Texas at 14 ft wide may need one or two in Washington or New York.
Missing the road-type switch. The escort count or position can change where a multilane highway becomes a two-lane road.
Measuring the spec sheet, not the load. Tarps, chains and attachments count. A few inches can cross a trigger.
Forgetting overhang. A load can be legal on width and length and still need an escort for overhang.
Assuming a certification card works everywhere. Check that each state on the route accepts it.

Check your states before you roll

Escort triggers vary by state and by road type, and they change. Check the issuing state for every leg.

On our oversize permit pages, each state page has an escort section with width, height and length triggers and links to the official sources. See Texas, Washington and New York for the examples above. To put two states side by side, use the state comparison tool.

Related guides

Escorts are one condition on a permit. These guides cover the others:

Pilot car basics: when an oversize load needs an escort