R.I. Gen. Laws § 24-8-39: Exit ramp control devices for divided highways.

The department of transportation shall install bidirectional control devices on all new or upgraded ramps exiting from any divided highway within this state. These devices shall be placed at the end of each ramp and shall conform with § 2E-41 of the manual for uniform traffic control devices. The device shall have red and white raised pavement markers that show red to drivers travelling the wrong way and white to drivers travelling the right way.