Connecticut Route 99

Route 99
Map of central Connecticut with Route 99 highlighted in red
Route information
Maintained by ConnDOT
Length:	10.64 mi (17.12 km)
Existed:	1969 – present
Major junctions
South end:	Route 9 in Cromwell
	I-91 in Rocky Hill US 5 / Route 15 in Wethersfield
North end:	Wethersfield-Hartford town line
Location
Counties:	Middlesex, Hartford
Highway system
Routes in Connecticut Interstate U.S. State SSR SR ← Route 97 Route 100 →

Route 99 is a state highway in Connecticut running for 10.64 miles (17.12 km) from Route 9 in Cromwell, through the town of Rocky Hill, ending in Wethersfield at the Hartford city line. The road continues into Hartford as a local road (Wethersfield Avenue). It follows the former alignment of Route 9 from prior to that route's upgrade to a freeway.

Route 99 begins as the northbound Exit 18 ramp of Route 9 in Cromwell. At the end of the off ramp, the road continues north as Main Street. (Access from Main Street to the southbound on-ramp for Route 9 is designated as State Road 901). Main Street is a two-lane road that goes north through Cromwell up to Rocky Hill for about 5.6 miles (9.0 km). At the junction with Elm Street (Route 160), the road becomes a four-lane road known as the Silas Deane Highway. The Silas Deane Highway continues through Rocky Hill up to the town of Wethersfield. It serves as the main thoroughfare of these two towns, also providing access to several shopping centers. Route 99 has interchanges with Interstate 91 in Rocky Hill and the Wilbur Cross Highway (Route 15) in Wethersfield. At the Hartford city line, Route 99 ends but the road continues into downtown Hartford as Wethersfield Avenue.