The route heads northwest through rural areas as a four-lane expressway with a wide grassy median and a speed limit of 55 miles per hour (89 km/h).

[4] Upon encountering a pair of traffic signals with Halsey Manor Road and Chapman Boulevard, CR 111 enters a more commercial area, housing two main shopping centers anchored by a King Kullen supermarket and CVS Pharmacy.

The initial plans were cancelled due to county budget cuts and environmental opposition to constructing a highway through the Pine Barrens region.

This is due to how it connects NY-27 to I-495, given the fact that it provides motorists with a link between the Hamptons and New York City, in addition to its suburbs in Nassau County and western Suffolk.

After the interchange with Middle Country Road (NY 25), it would shift eastward along the northern border of Brookhaven Lab, crossing the Robert Cushman Murphy County Park twice.

In between this Suffolk County Preserve area, it would run through the grounds of the Grumman Calverton Naval Weapons Industrial Reserve Plant.

It was then intended to replace CR 71 as it crossed Montauk Highway and headed through the village of Westhampton Beach towards the Atlantic Ocean coastline.

[10][11] Local residents and political leaders have made considerable efforts to enhance the safety conditions on County Route 111 (CR 111), particularly during peak travel times in the summer season.

[12] CR 111 acts as a significant conduit for travelers moving between the Long Island Expressway (I-495) and NY 27, often resulting in traffic congestion during Friday and Sunday afternoons.

In the 2010s, a controversy arose regarding a series of tall, metal transmission line poles, which had been recently installed along the highway by LIPA and PSEG Long Island.