TruckParkingInfo

Updated

Parking a Truck in Snow and Ice

Snow changes two decisions at once: where you can stop, and how much driving time the rule gives you to get there. This page separates those. It is general information for property-carrying drivers, not legal advice, not a forecast, and not a chain-law table. The hours-of-service sentences were checked against FMCSA on October 22, 2026.

The adverse-driving exception, in the words that are actually in the rule

FMCSA’s hours-of-service summary says property-carrying drivers may extend the 11-hour maximum driving limit and the 14-hour driving window by up to 2 hours when adverse driving conditions are encountered. The driver’s guide puts that exception in 49 CFR 395.1(b)(1), and the definition in 49 CFR 395.2. You can read the section at 49 CFR 395.1.

The guide’s definition is specific. Adverse driving conditions are conditions that were unknown, or could not reasonably have been known, to you immediately before the start of the duty day or before you resume driving after a qualifying sleeper-berth rest, or to the motor carrier immediately before dispatching you. The guide’s examples of things you could not anticipate are a highway blocked by a crash, or fog that appears suddenly. The guide says adverse driving conditions do not include congested traffic during typical rush-hour periods. A storm that was already on the forecast when you were dispatched is a planning problem. It becomes an hours-of-service exception only if it fits that “unknown or not reasonably known” test. If you are unsure, treat it as if the exception is unavailable and park sooner.

The extra 2 hours of driving and the extra 2 hours on the window go together. The guide says the window extension does not increase the 60-hour/7-day or 70-hour/8-day limits in 49 CFR 395.3(b). You can still be out of weekly hours in a snowstorm. A 34-hour restart is a different provision, and it requires 34 consecutive hours off duty, not a slow crawl through weather.

If you use the exception on an electronic log, the guide says 49 CFR 395.28(c) requires you to annotate the adverse conditions on the record of duty status and include details about the condition. On paper, the guide encourages the same kind of note in the remarks, with the city and state. Write what the condition was and when you hit it. “Weather” with no detail is a weak note if someone asks later.

Use the time to park, not to tour

The guide says the exception allows time to park and wait out the condition, or to drive slowly through it. Lots fill earlier when the weather turns, because everyone else is making the same choice. When the first overnight lot is full is harder in a storm: the backup may be icy, closed, or already taken by the trucks who stopped an hour before you. Name the backup while the road is still just wet.

Look up lots on the route you are already allowed to drive. I-80 and I-80 in Wyoming are examples of directory pages, including Laramie. They show places that exist in the dataset. They do not show which lots are plowed tonight, and they are not a statement of Wyoming chain rules. Chain, tire, and traction requirements are set by the state for the highway you are on. Check that state’s transportation department before the grade. This site does not keep a chain table, because an unsourced table would be a guess.

How to set the truck once you are in the lot

Park as level as the lot allows. A grade that was easy on dry pavement is a slide when melt refreezes overnight, and it is a bad place to learn that the trailer parking brake alone will not hold you. Chock the wheels. Point the truck so you can pull out in the morning without a tug if the stall ices. Nose-in against a drift, with the drive wheels on glare ice and the only exit uphill, is how trucks spend the restart waiting on a wrecker.

Leave room for the plow. A truck parked across the lane, tight against the only exit, or buried so the door will not open becomes the plow’s obstacle and your tow bill. Do not block the fuel island, the scale, or the one lane other drivers need to leave. If the lot is plowing one row at a time, the row they asked you to move from is the row you move from, even if you just got comfortable.

Fuel and fill DEF while the pumps are reachable. A shut canopy in the morning is a common way to lose the hours you saved by stopping early. If the store is closing or the lot is telling trucks to face out for the plow, do that before you start a 10-hour break or a 34-hour restart. Moving the truck two hours later, on duty, breaks the consecutive off-duty time the break depends on.

Idling limits are whatever the sign at that lot says, plus any local rule that applies on that property. A cold night does not erase a posted limit. This site does not catalog idling ordinances. If the sign limits idle, plan bedding, auxiliary power if the truck has it, and a legal place to be. Do not assume a rest area and a truck stop follow the same idle rule. The building at a rest area often closes earlier than the parking lot. A truck stop is more likely to have food and a warm room, and it can still post a time limit shorter than the storm. The comparison is in rest area or truck stop for 10 hours.

Before you roll again

What this page will not tell you

It will not tell you whether a named state requires chains on a named pass. That belongs to the state DOT for the day you are driving. It will not tell you the rest-area time limit. That belongs to the sign, and the time-limit page stays blank until each state is sourced from an official page. It will not tell you that a shoulder is legal because the lot was full. Shoulder and ramp rules stay on the to-do list in the overnight guide until a statute or a DOT page is cited for that state.

Sources: FMCSA HOS summary, FMCSA driver’s guide (April 28, 2022), 49 CFR 395.1, and 49 CFR 395.2.