The speed limit on Interstate 81 North starts out at 70 mph. This is the standard speed limit on most rural Interstate highways in West Virginia. (Photo taken 5/27/18).

State-named Interstate 81 North reassurance shield. (Photo taken 5/27/18).

Interstate 81 North at mile marker 1. (Photo taken 5/27/18).

All trucks and commercial vehicles must enter the Rest Area / Welcome Center ahead when the lights on this sign are flashing, since it is also used as a Weigh and Inspection Station. (Photo taken 5/27/18).

Rest Area / Welcome Center on Interstate 81 North. (Photo taken 5/27/18).

Mileage sign on Interstate 81 North. It's 3 miles to Inwood, 13 miles to Martinsburg, and 32 miles to Hagerstown, MD. (Photo taken 5/27/18).

View on Interstate 81 North at mile marker 3. (Photo taken 5/27/18).

Take Exit 5 to Harpers Ferry and Gerrardstown. (Photo taken 5/27/18).

Interstate 81 North at Exit 5: WV 51 - Inwood / Charles Town (Photo taken 5/27/18).

View on Interstate 81 North at mile marker 6.5. (Photo taken 5/27/18).

Take Exit 8 to Eastern West Virginia Regional Airport. (Photo taken 5/27/18).

Interstate 81 North at Exit 8: CR 32 - Tabler Station Rd (Photo taken 5/27/18).

Sign listing the distances to the three upcoming Martinsburg exits on Interstate 81 North. (Photo taken 5/27/18).

Take Exit 12 to Blue Ridge Community & Technical College. (Photo taken 5/27/18).

Interstate 81 North at mile marker 10.5. (Photo taken 5/27/18).

Also take Exit 12 to the V.A. Medical Center. (Photo taken 5/27/18).

Interstate 81 North at Exit 12: WV 45 / WV 9 East - Winchester Ave (Photo taken 5/27/18).

Take Exit 13 to the Historic Areas and Visitor Center. Also at this point, truck lane restrictions begin. Trucks are prohibited in the left lane. (Photo taken 5/27/18).

Interstate 81 North at Exit 13: CR 15 - King Street / Downtown (Photo taken 5/27/18).

Interstate 81 North at Exit 14: CR 13 - Dry Run Rd / Tennessee Ave (Photo taken 5/27/18).

Take Exit 16E to Shepherd University. Take Exit 16W to Hedgesville. (Photo taken 5/27/18).

Interstate 81 North at Exit 16E: WV 9 East - North Queen St (Photo taken 5/27/18).

Interstate 81 North at Exit 16W: WV 9 West - Berkeley Springs (Photo taken 5/27/18).

The speed limit remains 70 mph on Interstate 81 North through Martinsburg. (Photo taken 5/27/18).

Another mileage sign on Interstate 81 North. It's 3 miles to the junction of WV 901, 17 miles to Hagerstown, MD and 88 miles to Harrisburg, PA. (Photo taken 5/27/18).

View on Interstate 81 North at mile marker 17.5. (Photo taken 5/27/18).

Mile marker 19 on Interstate 81 North. (Photo taken 5/27/18).

Interstate 81 North approaching Exit 20 - 1/4 mile. (Photo taken 5/27/18).

Interstate 81 North at Exit 20: WV 901 - Spring Mills (Photo taken 5/27/18).

At mile marker 22, the truck lane restrictions come to an end. (Photo taken 5/27/18).

Interstate 81 North at Exit 23: US 11 - Marlowe / Falling Waters (Photo taken 5/27/18).

View on Interstate 81 North at mile marker 23.6. (Photo taken 5/27/18).

Another state-named Interstate 81 North reassurance shield. (Photo taken 5/27/18).

Interstate 81 North at mile marker 24.2. (Photo taken 5/27/18).

View on Interstate 81 North at mile marker 25. (Photo taken 5/27/18).

Mile marker 25.5 on Interstate 81 North as it nears the Maryland border. (Photo taken 5/27/18).

Advance signage for Exit 1 in Maryland as Interstate 81 North prepares to cross the state line at the Potomac River. (Photo taken 5/27/18).