Route 17 (Connecticut)
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| Route information | ||||
| Maintained by ConnDOT | ||||
| Length: | 36.33 mi (58.47 km) | |||
| Existed: | 1948 – present | |||
| Major junctions | ||||
| South end: | Middletown Avenue (near  I-91) in East Haven
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| North end: |
 Route 2 in Glastonbury
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| Location | ||||
| Counties: | New Haven, Middlesex, Hartford | |||
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| Location: | Portland |
| Length: | 3.02 mi (4.86 km) |
Route 17 is a primary north–south state route beginning in New Haven, through Middletown, and ending in Glastonbury, with a length of 36.33 miles (58.47 km).
Route 17 officially begins about 0.1 miles (0.16 km) west of its interchange with Interstate 91 (at Exit 8). Route 80 begins at the interchange and continues eastward while Route 17 turns northward. Route 17 is a 4-lane principal arterial road, becoming 2 lanes as it passes through North Haven, Northford (where it briefly overlaps with Route 22), and Durham. In Middletown it becomes a 4-lane freeway for 0.6 miles (0.97 km) leading to an interchange with the Route 9 freeway. Route 17 duplexes with Route 9 for about 0.8 miles (1.3 km) on a surface road from Exit 13 to Exit 16, where Route 17 exits and shortly thereafter begins a 3.0 miles (4.8 km) concurrency with Route 66 as it crosses the Connecticut River from Middletown into Portland. on the Arrigoni Bridge. Just after the bridge, it spawns a 3.02-mile-long (4.86 km) alternate, Route 17A, which leads to the center of town. Routes 17 and 66 become a 4 lane principal arterial for the rest of the concurrency, where Route 17 turns north and becomes a secondary 2-lane arterial. After meeting the northern end of Route 17A, it enters Glastonbury, passing through the South Glastonbury Historic District and gradually becoming more suburban. The last 1.4 miles (2.3 km) of Route 17 is a freeway, which ultimately merges into Route 2 West at Exit 7.
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