Interstate 270 South at Exit 31B: MD 85 South - Buckeystown  (Photo taken 11/5/15).

Interstate 270 South at Exit 31A: MD 85 North - Frederick  (Photo taken 11/5/15).

Interstate 270 South shield located just south of Exit 31A.  (Photo taken 11/5/15).

Speed limit sign near mile marker 31. The speed limit on Interstate 270 South starts out at 65 mph.  (Photo taken 11/5/15).

Mileage sign near mile marker 30.5. It's 4 miles to the junction of MD 80, 22 miles to Rockville, and 41 miles to Washington DC.  (Photo taken 11/5/15).

Interstate 270 South at mile marker 30.  (Photo taken 11/5/15).

Interstate 270 South: Road view from mile marker 29.  (Photo taken 11/5/15).

Approaching Exit 26, this sign warns truck drivers that thru trucks over 5 tons Gross Vehicle Weight are not allowed to use MD 355 south of MD 80.  (Photo taken 11/5/15).

Take Exit 26 to Park & Ride access.  (Photo taken 11/5/15).

Interstate 270 South at Exit 26: MD 80 - Urbana / Buckeystown  (Photo taken 11/5/15).

Speed limit assurance sign south of Exit 26. Speed Limit - 65 mph.  (Photo taken 11/5/15).

Interstate 270 South at mile marker 25.  (Photo taken 11/5/15).

Interstate 270 South: Road view from mile marker 24.  (Photo taken 11/5/15).

Take Exit 22 to Poolesville and Sugarloaf Mountain.  (Photo taken 11/5/15).

Approaching Exit 22, this sign reminded truck drivers that thru trucks over 5 tons GVW are prohibited on MD 355.  (Photo taken 11/5/15).

This sign states that Interstate 270 is dedicated to Senator Charles "Mac" Mathias.  (Photo taken 11/5/15).

Interstate 270 South at Exit 22: MD 109 - Barnesville / Hyattstown  (Photo taken 11/5/15).

Interstate 270 South at mile marker 22.  (Photo taken 11/5/15).

Interstate 270 South at the Weigh Station located at mile marker 21.  (Photo taken 11/5/15).

Interstate 270 South assurance shield near mile marker 20.5.  (Photo taken 11/5/15).

Near mile marker 20, the speed limit decreases to 55 mph and remains that way for the rest of Interstate 270 South's duration.  (Photo taken 11/5/15).

Take Exit 18 to Little Bennett and Black Hill Regional Parks.  (Photo taken 11/5/15).

Interstate 270 South at Exit 18: MD 121 - Boyds / Clarksburg  (Photo taken 11/5/15).

Mileage sign just south of Exit 18. For whatever reason, this mileage sign includes halves for each of its three listed destinations. It's 2 1/2 miles to the junction of MD 118, 9 1/2 miles to Rockville, and 23 1/2 miles to Washington DC.  (Photo taken 11/5/15).

Take either of the next 2 exits to Germantown.  (Photo taken 11/5/15).

If you're planning on going to Nationals Park via the Metro, use Exit 9A.  (Photo taken 11/5/15).

Interstate 270 South at Exit 16: MD 118 (Father Hurley Blvd) - Damascus  (Photo taken 11/5/15).

Take Exit 15A to Montgomery College and Exit 15B to Dept. of Energy.  (Photo taken 11/5/15).

Interstate 270 South at Exits 15B-A: MD 118 / To MD 355 - Germantown  (Photo taken 11/5/15).

Interstate 270 South at mile marker 14.  (Photo taken 11/5/15).

Overhead sign listing the exit numbers for the three upcoming exits to Gaithersburg.  (Photo taken 11/5/15).

Take Exit 11 to Gaithersburg Historic District.  (Photo taken 11/5/15).

Also take Exit 11 to Gaithersburg Town Center, Montgomery Village, and the Fairgrounds via MD 124 North.  (Photo taken 11/5/15).

Take Exit 11 to NIST and Seneca Creek State Park via MD 124 South.  (Photo taken 11/5/15).

Interstate 270 South at Exit 11: MD 124 - Montgomery Village Ave / Quince Orchard Rd  (Photo taken 11/5/15).

Interstate 270 South approaching Exit 9 - 1 1/4 miles.  (Photo taken 11/5/15).

Speed limit sign near mile marker 9.5. Speed Limit - 55 mph.  (Photo taken 11/5/15).

Take Exit 9A to the Metro Station and Exit 9B to Sam Eig Hwy.  (Photo taken 11/5/15).

Sign listing the exit numbers for the three upcoming exits to Rockville.  (Photo taken 11/5/15).

This overhead sign lists the toll rates on MD 200 for 2 axle vehicles. MD 200 is a toll road which can be accessed by taking Exit 9A ahead.  (Photo taken 11/5/15).

Interstate 270 South as it prepares to split into local and express lanes. Exit 9, seen here, is the final exit before this local/express lane split occurs.  (Photo taken 11/5/15).

Interstate 270 South at Exit 9B: Sam Eig Hwy; Exit 9A: Interstate 370 East / To MD 200 Toll  (Photo taken 11/5/15).

Take Exit 8 to Johns Hopkins University and The Universities at Shady Grove.  (Photo taken 11/5/15).

Interstate 270 South (local lanes) at Exit 8: Shady Grove Rd  (Photo taken 11/5/15).

Interstate 270 South at Exit 6: MD 28 - West Montgomery Ave  (Photo taken 11/5/15).

Take Exit 5 to Potomac.  (Photo taken 11/5/15).

Mileage sign near mile marker 5. It's 8 miles to the junction of Interstate 495 (Capital Beltway), 11 miles to Northern Virginia, and 17 miles to Washington DC.  (Photo taken 11/5/15).

Interstate 270 South at the access to the local lanes for Exits 5 and 4.  (Photo taken 11/5/15).

Interstate 270 South at Exit 5: MD 189 - Falls Rd  (Photo taken 11/5/15).

Interstate 270 South at another crossover / express lanes entrance from the right.  (Photo taken 11/5/15).

Interstate 270 South at Exit 4B: Montrose Rd West  (Photo taken 11/5/15).

Interstate 270 South at Exit 4A: Montrose Rd East  (Photo taken 11/5/15).

Keep left on Interstate 270 South for HOV access to Interstate 495 East and South.  (Photo taken 11/5/15).

Interstate 270 South approaching the point at which it divides into I-270 South and I-270 Spur South - 1 mile. Use I-270 South to I-495 East. Use I-270 Spur South (right 3 lanes) to I-495 South toward Northern Virginia (and the shortest route to I-95 South).  (Photo taken 11/5/15).

Interstate 270 South approaching its dividing point - 1/2 mile. Again, use the leftmost lane at this point for HOV access to Interstate 495 South or East.  (Photo taken 11/5/15).

Interstate 270 South as Interstate 270 Spur South branches off to the right to head to I-495 South toward Northern Virginia. Keeping to the right here is the fastest and shortest route to Interstate 95 South if you're headed to Richmond or points south of there.  (Photo taken 11/5/15).

Overhead sign listing the distances to the three remaining exits / interchanges on Interstate 270 South.  (Photo taken 11/5/15).

Interstate 270 South at Exit 1: Rockledge Rd / MD 187 - Old Georgetown Rd  (Photo taken 11/5/15).

The leftmost lane on this stretch of Interstate 270 South is restricted to HOV traffic Monday through Friday from 6 to 9 AM, as this sign reads.  (Photo taken 11/5/15).

Interstate 270 South approaching the junction of MD 355 South / Interstate 495 East (I-270's southern terminus) - 1 mile.  (Photo taken 11/5/15).

Interstate 270 South at its southern terminus, as you can exit to the left to go onto MD 355 South toward Bethesda or stay straight to go onto Interstate 495 East (Capital Beltway) toward College Park and Silver Spring.  (Photo taken 11/5/15).