Р-18 is a very scenic coastal road located in the Balkan Province of Turkmenistan.
The road is 187km long. The surface is gravel. 4x4 recommended. Impassable after rains. It links Türkmenbaşy on the Krasnovodsk Gulf of the Caspian Sea and Garabogaz, a city is located on a ridge which divides the Garabogazköl lagoon from the Caspian Sea.