MileCheckConnecticut is a small, dense state where the highways do heavy lifting — I-95 along the shoreline, I-84 inland, and some of the busiest commuter miles in the Northeast. Here's how its mile markers work, where they matter most, and how to see your exact one plus live CTDOT alerts in real time.
How Connecticut numbers its highways
Connecticut's mileposts count up from the west and south. On I-95, mile 0 sits at the New York line near Greenwich, and the numbers climb about 112 miles along Long Island Sound to the Rhode Island border. Worth knowing: Connecticut has been converting exit numbers from sequential to mile-based on several routes in recent years, so on those roads a newer exit number matches the milepost where it sits — the same logic Massachusetts adopted statewide. Mile marker data for every Connecticut highway is bundled into MileCheck and works offline.
The corridors people actually drive
- I-95 hugs the shoreline the whole way — Greenwich, Stamford, Bridgeport, New Haven, New London, then Rhode Island.
- I-84 is the inland route — Danbury, Waterbury, Hartford, and on toward Massachusetts.
- I-91 runs north from New Haven through Hartford up the Connecticut River valley.
- Route 15 — the Merritt and Wilbur Cross parkways — is the historic, no-trucks alternative to I-95, and US-7 climbs the western valleys toward the Berkshires.
Where mile markers matter most: the Stamford–Bridgeport crawl
The stretch of I-95 between Stamford and Bridgeport is Connecticut's defining road problem — dense commuter and truck traffic on a corridor that fills up morning and evening, where a single fender-bender ripples for miles. Traffic and incident reports there come fast and are pinned to exits and mile markers. Knowing your milepost is how you tell whether the crash at mile 27 is your problem or the other direction's.
Coastal storms and inland ice
Connecticut catches it from two sides: nor'easters and coastal flooding along the I-95 shoreline, and snow and ice on I-84's inland hills around Danbury and Waterbury. Storm closures, speed restrictions, and crash reports are given by route and milepost, and on a corridor as tight as I-95 the difference of a few mile markers decides whether you bail to the Merritt or ride it out.
Live Connecticut alerts, in one place
MileCheck pulls live road alerts for Connecticut — closures, crashes, and construction — tied to the mile marker and direction so you can see what's ahead of you on your side of the road. Alerts refresh in real time, and the mile marker data underneath works offline.
Everyday and emergency
Whether you're stuck in the Stamford crawl wondering what's ahead, reporting a breakdown on I-84, or telling a friend which rest stop you're at on I-95, the mile marker is the location Connecticut's roads run on. MileCheck shows yours in real time, down to a tenth of a mile, with CarPlay and Android Auto for the commute.
Keep reading
Nearby state guides: Massachusetts · New York · Rhode Island
Connecticut drawbridges: every movable bridge, its opening rules →
Essentials: What to tell 911 on the highway · How to find your mile marker · Browse the live mile marker map · All 50 states