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TRB’s National Cooperative Highway Research Program (NCHRP ) Web-Only Document 220: Estimating the Life-Cycle Cost of Intersection Designs describes the Life-Cycle Cost Estimation Tool (LCCET). The LCCET spreadsheet allows users to compare alternative intersection designs based on initial construction costs, ongoing maintenance and operations costs, operational efficiencies for a variety of modes, safety effects, and emissions. Alternative designs include roundabouts and traditional intersections using stop signs and traffic signals. Use of the tool is designed to help provide a consistent approach to these comparisons based on benefits and costs.

The Life-Cycle Cost Estimation Tool is available for download. Complementary products to the LCCET and Web-Only Document include the following:
Presentation that describes NCHRP Project 03-110, which developed the LCCET
• Case Studies demonstrating the LCCET
o CS1: Base Case of Signalized Intersections, Alternatives of Multilane Roundabout and Enhanced Signalized Intersection
o CS2: Base Case of Two-Way Stop, Alternatives of Roundabout and Offset T-Intersections
o CS3: Base Case of Offset T-Intersections, Alternatives of Roundabout and Signalized Intersection
o CS4: Base Case of Two-Way Stop, Alternative of Signalized Intersection
o CS5: Base Case of Signalized Intersection (Divided Highway), Alternative of Median U-Turn Intersection
o CS6: Base Case of All-Way Stop, Alternatives of Signalized Intersection and Roundabout Intersection

Software/Excel Spreadsheet Disclaimer – This software is offered as is, without warranty or promise of support of any kind either expressed or implied. Under no circumstance will the National Academy of Sciences or the Transportation Research Board (collectively “TRB”) be liable for any loss or damage caused by the installation or operation of this product. TRB makes no representation or warranty of any kind, expressed or implied, in fact or in law, including without limitation, the warranty of merchantability or the warranty of fitness for a particular purpose, and shall not in any case be liable for any consequential or special damages.

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