Rimrock logo

MDT anticipates construction would start in the spring of 2023 contingent on the ability to acquire right-of-way and the anticipated available federal funding.

Project Overview

This project will install a roundabout in Billings at the intersection of Rimrock Road and 62nd Street West. Installing a roundabout also means there will be some other changes such new curbs, medians, and striping (the painted lines that help direct traffic). You can also expect to see new LED lights and different culverts along the side of the road.

aerial project photo of Rimrock Intersection

Click the image for a larger view.

Project Basics

This project will be developed in two phases:

  • "Other" (OT) Phase (Phase I) - accurately assess the need, feasibility, and fundability for conceptual intersection improvements with the implementation of a roundabout. If feasible, move to Phase II.
  • "Design and R/W" Phase (Phase II) - complete detailed design and secure necessary right-of-way so that the project can ultimately be constructed.

Roundabout Specifics:

  • 12-ft. lanes, 4-ft paved shoulders on non-curbed sections
  • 12-ft. lanes, 2-ft shoulders on curbed sections
  • 18-ft. paved and striped median on the north leg
  • Variable width raised-median
  • 8-ft. sidewalks (with 7-ft. boulevards) around roundabout only to connect ramps
  • LED lighting

Purpose of the project

Roundabouts are to improve safety at intersections like this one. By design, roundabouts:

  • provide good visibility to all drivers and pedestrians;
  • slow traffic down to safer speeds;
  • decrease the number of vehicle and pedestrian conflicts compared to other intersections; and
  • significantly decrease the chance of serious crashes.

Other options like traffic signals, stop signs, or flashing lights all come with risks the roundabout helps us eliminate.

Why a Roundabout?

Watch on YouTube

Project Timeline


  • Control Survey
  • Topographic Survey
  • Cadastral Survey
  • Utility Designations
  • Utility Coordination
  • Cultural/Biological/Noise Analysis
  • Geotechnical Investigation
  • Irrigation Research and Design
  • Traffic Study
  • Hydraulic Analysis and Design
  • Ownership Study
  • Preliminary Roundabout Layout
  • Preliminary Plan review – 30% Design
  • 1st Public Open House
  • Project Feasibility Report
  • Environmental Document
  • Determining right-of-way needs
  • Preliminary Plans, Specifications and Cost Estimate – 80% Design
  • Agency, Stakeholder, Landowner, & Community Outreach
  • Scope of Work Report
  • Identifying impacts to utilities
  • Finalized R/W Design and Plans
  • 2nd Public House


  • Final Hydraulics Analysis and Reporting
  • Final Street, Drainage, Geotechnical, Lighting, Signing/Striping Design
  • Final Cost Estimating
  • Final Traffic Control and Construction Planning
  • Final Project Specifications
  • Environmental Permits
  • Final Plans
  • Land Appraisals
  • Utility Potholes
  • Continued Agency Coordination


  • Future Public Involvement
  • Utility agreements
  • Right of Way Acquisition
  • Utility relocation
  • Final Plans complete
  • Construction

Download the timeline graphic

UPN 9383000