Mile markers, state by state

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MileCheck covers mile markers in all 50 states and pulls live DOT road alerts in 48. State by state, we're writing the driver's guide to how each one's mileposts actually work — the corridors, the passes, the quirks, and what the DOT closes. Green-bordered states have their guide.

Alabama

AL

● Mile markers ● Live DOT alerts ● Drawbridges

I-65: 366 miles from the Gulf to the Tennessee line.

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Alaska

AK

● Mile markers ● Live DOT alerts

“Mile 99 Glenn Highway” is an actual Alaska address.

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Arizona

AZ

● Mile markers ● Live DOT alerts

Why I-17 starts at 194 and I-19 is in kilometers.

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Arkansas

AR

● Mile markers ● Live DOT alerts ● Drawbridges

I-40’s truck river runs on mile markers.

Read the driver’s guide →

California

CA

● Mile markers ● Live DOT alerts ● Drawbridges

Postmiles reset at every county line.

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Colorado

CO

● Mile markers ● Live DOT alerts

The Eisenhower Tunnel tops out I-70 at 11,100 ft.

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Connecticut

CT

● Mile markers ● Live DOT alerts ● Drawbridges

Milepost math for the Stamford–Bridgeport crawl.

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Delaware

DE

● Mile markers ● Live DOT alerts ● Drawbridges

23 miles of I-95 carry the whole East Coast.

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Florida

FL

● Mile markers ● Live DOT alerts ● Drawbridges

In the Keys, addresses ARE mile markers.

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Georgia

GA

● Mile markers ● Live DOT alerts ● Drawbridges

GDOT calls everything “SR” — here’s how to read it.

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Hawaii

HI

● Mile markers ● Live DOT alerts

On the Road to Hana, the mile markers ARE the directions.

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Idaho

ID

● Mile markers ● Live DOT alerts ● Drawbridges

US-95 runs 538 lonely miles border to border.

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Illinois

IL

● Mile markers ● Live DOT alerts ● Drawbridges

Downstate is flat, landmark-poor mile-marker country.

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Indiana

IN

● Mile markers ● Live DOT alerts ● Drawbridges

More interstates converge on Indy than almost anywhere.

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Iowa

IA

● Mile markers ● Live DOT alerts

306 miles of I-80 and the ground blizzards that close it.

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Kansas

KS

● Mile markers ● Live DOT alerts ● Drawbridges

424 miles of I-70 — the longest single-state stretch anywhere.

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Kentucky

KY

● Mile markers ● Live DOT alerts ● Drawbridges

31E vs 31W: different highways, one letter apart.

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Louisiana

LA

● Mile markers ● Live DOT alerts ● Drawbridges

18 exit-free miles over the swamp — the milepost is the address.

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Maine

ME

● Mile markers ● Live DOT alerts ● Drawbridges

Two hours of woods north of Bangor — know your milepost.

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Maryland

MD

● Mile markers ● Live DOT alerts ● Drawbridges

Counties log miles, but the sign is what counts.

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Massachusetts

MA

● Mile markers ● Live DOT alerts ● Drawbridges

Since 2020, the exit number is the mile marker.

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Michigan

MI

● Mile markers ● Live DOT alerts ● Drawbridges

One interstate stitches both peninsulas at the Mackinac Bridge.

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Minnesota

MN

● Mile markers ● Live DOT alerts ● Drawbridges

Where I-35 forks in two — the Twin Cities split.

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Mississippi

MS

● Mile markers ● Live DOT alerts ● Drawbridges

I-55 north-south, plus the Natchez Trace’s own mileposts.

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Missouri

MO

● Mile markers ● Live DOT alerts ● Drawbridges

The lettered-route state: Route AA, I-70, and old Route 66.

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Montana

MT

● Mile markers ● Live DOT alerts

The highest point on I-90 in America.

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Nebraska

NE

● Mile markers ● Live DOT alerts ● Drawbridges

455 miles of I-80 — the Platte River road, gated by the mile.

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Nevada

NV

● Mile markers ● Live DOT alerts

US-50: the Loneliest Road in America.

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New Hampshire

NH

● Mile markers ● Live DOT alerts ● Drawbridges

Where I-93 squeezes to two lanes through the Notch.

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New Jersey

NJ

● Mile markers ● Live DOT alerts ● Drawbridges

The Turnpike and Parkway run their own mile numbers.

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New Mexico

NM

● Mile markers ● Live DOT alerts

Milepost paddles mark even the empty Route 66 two-lanes.

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New York

NY

● Mile markers ● Live DOT alerts ● Drawbridges

The little green reference markers, decoded.

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North Carolina

NC

● Mile markers ● Live DOT alerts ● Drawbridges

I-40 runs mountain fog to beach sand — 420 miles, one road.

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North Dakota

ND

● Mile markers ● Live DOT alerts

ND gates the interstate shut when ground blizzards hit.

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Ohio

OH

● Mile markers ● Live DOT alerts ● Drawbridges

The Turnpike runs its own milepost line across the north.

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Oklahoma

OK

● Mile markers ● Live DOT alerts

Every turnpike keeps its own milepost line.

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Oregon

OR

● Mile markers ● Live DOT alerts ● Drawbridges

Cabbage Hill, Gorge ice, and the new half-mile markers.

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Pennsylvania

PA

● Mile markers ● Live DOT alerts ● Drawbridges

Two I-76s, two numbering systems.

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Rhode Island

RI

● Mile markers ○ Alerts coming soon

The whole state in 43 mile markers.

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South Carolina

SC

● Mile markers ● Live DOT alerts ● Drawbridges

The I-95 pine flats and I-26’s hurricane lane reversal.

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South Dakota

SD

● Mile markers ● Live DOT alerts ● Drawbridges

Reference markers: trust the sign, not the tape measure.

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Tennessee

TN

● Mile markers ● Live DOT alerts ● Drawbridges

455 miles of I-40, fog gorge and all.

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Texas

TX

● Mile markers ● Live DOT alerts ● Drawbridges

880 miles of I-10 in one state.

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Utah

UT

● Mile markers ● Live DOT alerts

106 miles of interstate with no services.

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Vermont

VT

● Mile markers ● Live DOT alerts ● Drawbridges

Mile markers that reset at every town line.

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Virginia

VA

● Mile markers ● Live DOT alerts ● Drawbridges

VDOT says report your mile marker — here’s how.

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Washington

WA

● Mile markers ● Live DOT alerts ● Drawbridges

The passes that close more than almost anywhere.

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West Virginia

WV

● Mile markers ● Live DOT alerts

88 mountain miles where the milepost is your lifeline.

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Wisconsin

WI

● Mile markers ● Live DOT alerts ● Drawbridges

One road, two numbers: the I-90/94 Dells overlap.

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Wyoming

WY

● Mile markers ○ Alerts coming soon

Elk Mountain: America’s most-closed interstate, by mile range.

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