Can a Municipality use an intersection as part of a turnaround for a boat launch?
Vehicle and Traffic Law 1211 discusses limitations on backing. Whether this is legal or not depends upon whether it can be done safely. It may require the use of spotters or others to help direct traffic.
It is important to note that there may be other laws or relevant court cases that have set precedent on this issue. It is always best to check with your local legal council if you are unsure.Vehicle and Traffic
§ 1211. Limitations on backing.
(a) The driver of a vehicle shall not back the same unless such movement can be made with safety and without interfering with other traffic.
(b) The driver of a vehicle shall not back the same upon any shoulder or roadway of any controlled-access highway.
(c) the driver of a motor vehicle engaged in retail sales of frozen desserts as that term is defined in subdivision thirty-seven of section three hundred seventy-five of this chapter directly to pedestrians shall not back the same to make or attempt to make a sale.