RRTS may refer to:
Regional Rapid Transit System in India, also known as Namo Bharat Delhi–Meerut Regional Rapid Transit System Delhi–Alwar Regional Rapid Transit System Delhi–Panipat Regional Rapid Transit System Rock Run Trails System, in Pennsylvania, United States Request for Request to Send, a component of the network protocol Multiple Access with Collision Avoidance for Wireless Road Roll-on/Roll-off Terminal System, another name for the Philippine Nautical Highway System Rural radiotelephone service, a component of rural radio service in the United States