Farm to Market Road 423

Farm to Market Road 423 (FM 423) is a farm to market road in Denton County, Texas.

Route description

FM 423 is major north–south arterial through the cities of The Colony, Frisco, and Little Elm, providing access to area highways for both existing residences and new subdivisions being developed in central Denton County. The route begins at SH 121 (the mainlanes of which are the Sam Rayburn Tollway) in The Colony. The route travels north through The Colony, where it is known locally as Main Street, and into Frisco. It briefly skirts the eastern edge of Little Elm before reentering Frisco and ending at US 380.

Due to rapid growth during the late 1990s and early 2000s, plans were made to widen FM 423 into a six (6) to eight (8) lane thoroughfare. FM 423 will be widened to eight (8) lanes between SH121/Sam Rayburn Tollway and Ridgepointe Drive, and widened to six (6) lanes from Ridgepoint Drive north to SH380, approximately 11 miles. The new road will include auxiliary Left and Right Turn lanes, a new signal light at Lake Highlands Drive, and sound barrier walls in specific locations. Construction from the northern city limit of The Colony north to FM 720 is complete as of June 2013.