Route 229 nominally begins at the end of the eastbound Exit 31 off-ramp of I-84 in western Southington, heading northward along West Street.

[2] State maintenance and the official southern end of Route 229 begins about 0.01-mile (0.016 km) south of the off-ramp.

[1][2] Route 229 continues into Bristol, passing in front of the headquarters of ESPN and the access road to the Lake Compounce theme park.

It continues north for another 1.5 miles (2.4 km), passing in front of De Witt Page Park until it reaches US 6 (Farmington Avenue) in the Edgewood section of the city.

In anticipation of increased traffic due to the construction of I-84, Southington lobbied for state maintenance of a section of West Street.