The Almanac highlights Connecticut's statewide road system.
If you've ever wondered "does Connecticut have any SPUIs?" or "What's the widest highway in Connecticut?", you may find the answer here.
There's an even more obscure set of lists, mostly regarding route numbers, at the Lists page.
- Number of signed state routes: 215
- Number of U.S. routes: 7 (US 1, US 1A, US 5, US 6, US 7, US 44, US 202)
- Number of Interstate routes: 8 (I-84, I-91, I-95, I-291, I-384, I-395, I-684, I-691)
- Duplicate numbers in different classes allowed? No; but for a short while I-87 and CT 87 coexisted
- Letter suffixes? Yes; 'A' in a few cases (more rare now than decades ago); a couple instances of 'B', 'C', and 'D' for unsigned routes
- Letter-only routes? No. Routes A and B have been signed along existing numbered routes, but are not in the highway log
- Number continuity across state lines? Yes; in all present cases where route is state-maintained on both sides
- Discontinuous signed routes? No; four routes have gaps in state maintenance, but are still continuously signed
- Highest signed state route: CT 372 (present and historical)
- Highest unsigned state route: SR 920 (present); SR 1001 (historical)
Route Number Classes
- New England Interstate (1922 - 1931). Routes 8, 10, 12 and 32 remain from this system.
- State Highway - Primary 1923 - 1931). Number range: 101 - 299
- State Highway - Secondary (1923 - 1931). Number range: 300 - up
- Interstate (1956 - present)
- U. S. (1926 - present)
- State signed (1932 - present). Number range: 2 - 399
- State unsigned (1932 - 1963). Number range: 401-1001
- Special Service Routes (SSR) (1963 - present). Number range: 401-499
- State Roads (SR) (1963 - present). Number range: 501-999
- County routes: none
- Business routes: Rare; reportedly a BUS I-84 in Newtown, years ago
- Other special routes: Rare; historical local use of "LOOP 2" circa 1972 in Marlborough; local use of "Route 165A" in Preston
- Total state-maintained route mileage: 3,732.8
- Number of interchanges: about 400
- Suicide lanes: none
- Center lanes for opposing left turns: none known
- Reversible lanes: Asylum Avenue, Hartford; possible others
- Triple left turn lanes: none known
- Rotaries: a few, as at CT 79/CT 80, CT 80/CT 81, CT 2/CT 184, CT 188/CT 334.
- Roundabouts: a few, as at CT 4/CT 163
- Jughandles: at least 5 (rl(CT 71) at I-84 EB; CT 4 at SR 508, SSR 401 at SSR 403, US 5/CT 15 SB at CT 9, CT 137 at CT 15)
- Michigan lefts: none
- Texas U-Turns: none
- One-way Frontage Roads: I-95 in Waterford and New London; I-395 at CT 138 and CT 164
- Super 2: CT 78; stretch of US 6 east of I-395. CT 2A was formerly a Super 2, but was widened in 1996.
- Super 4: CT 2, new 2009 construction near Foxwoods in Ledyard. 4 lanes undivided, with interchanges.
- HOV Lanes: I-84, East Hartford to Vernon; and I-91, Hartford to Windsor Locks. I-384 technically has some, but only for the approach to I-84. All HOV facilities are separated from main lanes and have their own entrances and exits.
- Zipper lanes: none
- Double-decking: on I-84 in Waterbury (over CT 8); and on CT 8 just south of I-84.
- Opposing roadway crossover: none today. But I-84 in Waterbury east of CT 8 did this until about 1973.
- One-lane underpasses: a few, notably CT 150/CT 71 in Wallingford, under a railway.
- Collector-distributor (C/D) lanes: I-84 at I-291 and I-384 complex, Manchester
- Diverging diamond: none
- Full cloverleaf: Three (CT 15 at CT 34; CT 15 at old US 7; I-95 at US 1, Milford)
- Stack: One (I-84 at CT 9; built for I-291; partially unused)
- Single-point urban interchange (SPUI): One open (CT 15 at CT 111); two planned (I-84 exit 43, US 5/CT 15 at CT 175)
- "Volleyball": none; one was planned at I-291 and Berlin Tpke
- Left exits: Funny you should ask. About 35 of these statewide.
- Ramp meters: none known; one was tested at CT 17 onramp to CT 9 NB, Middletown
- Color-coded markers: - for a few years starting in 1948 (details)
- Diagrammatic signs - 2/17, 95/91/34, 9N at 91, 95N at 395, 9N at 72
(See also: (Exit Numbering)
- System: sequential. But milepost-based numbers were considered in the 1970s
- Suffixes: directional (e.g E/W) when warranted; A/B in some cases; up to Exit 5D in E. Hartford on CT 2. Some 'A' numbers belong to newer interchanges inserted in the sequence. In a few cases where suffixes would apply, consecutive numbers are used instead.
Superlatives and Extremes
- Longest state route, in state: CT 15 (83.53 miles)
- Longest state route, counting out-of-state continuations: CT 10 (about 262 miles)
- Shortest signed state route: CT 125, 1.24 miles
- Shortest unsigned state route: SR 910, 0.04 miles
- Widest road: 12 lanes (includes 2 HOV), I-84, between CT 15 and I-384, East Hartford
- Most numerous overlap (aka "multiplex"): Four (I-84 and US 6/7/202, Danbury)
- Highest exit number: 100 (present) on I-395; 106 (historical) on I-86
- Covered Bridges: three standing: Bulls Bridge; Cornwall (CT 128); and Colchester (alongside CT 16, pedestrian access only)
- Suspension Bridges: none; but there was one in the 19th century where CT 140 is now
- Cable-stayed bridges: one planned for I-95 in New Haven over the Quinnipiac River
Toll Facilities - Present
- CT 160 Ferry, Rocky Hill - Glastonbury Oldest continously operating ferry in US (if you don't count winters)
- CT 148 Ferry, Chester - Hadlyme
Toll Facilities - Past
- Connecticut Turnpike (I-95, I-395, SSR 695): from opening date (1958) to 1985
- Merritt Parkway (CT 15): from 1939 to 1988
- Wilbur Cross Parkway (CT 15): from opening dates to 1985
- Bissell Bridge (CT 291): from c. 1957 to c. 1985
- Bulkeley Bridge (I-84): dates unknown
- Founders Bridge (CT 2): from c. 1957 to c. 1962
- Charter Oak Bridge (CT 15): from opening date (1942) to April 28, 1989
- Putnam Bridge (CT 3): from opening date (1958) to c. 1987
- Baldwin Bridge (I-95): tolls removed 1968
- Mohegan - Pequot Bridge (CT 2A): Dec. 1, 1967 (bridge opening) to Sept. 30, 1980
- Gold Star Bridge (US 1, now I-95): tolls removed 1963
- "Toll Revenue Jumps 46.5% in 10 Years." Hartford Courant, Sept. 13, 1973.
- "Bridge Tolls To Be Dropped." Hartford Courant, Sept. 8, 1980.