align="top" width="100%"|Rhode Island State Highway 1A is a numbered State Highway in Rhode Island, running 34.4 miles in five sections. Many of the signs replace the 'R.I.' in the shield with the word 'SCENIC', and use green for the 'SCENIC' and often the '1A'. Route RI 1A takes the following route through the State: Section 1: - Westerly: 8.8 miles; US 1 to US 1
- Main Street, Beach Street, Watch Hill Road and Shore Road
Section 2: Section 3: Section 4: Section 5: History At various points in time, every segment of RI 1A except the one in Westerly served as part of US 1 (historically the Lower Boston Post Road). The RI 1A designation came after the US 1 designation was moved to a different alignment. Before that, RI 1A existed on an alignment that's now roughly RI 3. Notes RI 1A should not be confused with US 1A. In Rhode Island, RI 1A exists in segments between Westerly and North Kingstown. The segment north of North Kingstown, which begins in Warwick, is designated as US 1A. Not helping matters is the presence of incorrect signs on both routes, marking RI 1A as US 1A and US 1A as RI 1A. In southern Rhode Island, much of US 1 consists of a divided highway with no direct access across; cross traffic must turn right and use a U-turn ramp in the median. Several of the sections of RI 1A end at US 1 in this manner; the northernmost one crosses US 1 like this. Both of these cases can be considered short multiplexes. | valign="top"|right |