Route 159 (Connecticut–Massachusetts)
Route 159 highlighted in red | ||||||||||
| Route information | ||||||||||
| Maintained by CTDOT | ||||||||||
| Length | 21.14 mi (34.02 km) | |||||||||
| Existed | October 1968–present | |||||||||
| Major junctions | ||||||||||
| South end | Main Street at the Hartford–Windsor, CT line | |||||||||
| I-91 in Windsor, CT I-291 / Route 218 in Windsor, CT I-91 in Windsor Locks, CT Route 57 in Agawam, MA | ||||||||||
| North end | Route 75 / Route 147 in Agawam, MA | |||||||||
| Location | ||||||||||
| Country | United States | |||||||||
| States | Connecticut, Massachusetts | |||||||||
| Counties | CT: Hartford, MA: Hampden | |||||||||
| Highway system | ||||||||||
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Route 159 is a 21.14-mile-long (34.02 km) state highway connecting the Hartford and Springfield areas in the U.S. states of Connecticut and Massachusetts. It begins at the Hartford–Windsor town line and proceeds northward along the west bank of the Connecticut River towards Agawam, Massachusetts. The route ends at the junction of Route 147 and Route 75 in Agawam center just south of the West Springfield city line. The route was originally designated as U.S. Route 5A in 1932 and was renumbered to its modern designation in October 1968.