Upgrading the Saco Toll Plaza’s toll systems as part of a system wide improvement in Maine
The Maine Turnpike Authority (MTA) planned to upgrade the Saco Toll Plaza’s toll systems as part of a system wide improvement, and that required closing a toll lane during construction. To maintain three functional lanes during construction, an additional toll lane was needed, and was needed quickly.
We were hired to develop the design and contract documents for this toll lane addition. In seven months our team developed the project from concept to 100 percent PS&E. We reported on highway and toll plaza geometric design, drainage design, structural gantry and overhead sign support design, guardrail design, geotechnical analysis and design, maintenance of traffic, signs and pavement markings, toll systems coordination, utility coordination, environmental resource identification, and permitting.
Using subsurface investigation, laboratory testing, and geotechnical analysis, we predicted that the additional load from a conventional earth embankment fill would cause settlement up to 13 inches. The solution? Blocks of lightweight geofoam were used to partially offset the weight and reduce the magnitude of the settlement.
With our team’s work, the MTA was able to manage traffic during construction and eventually improve conditions at the Saco Toll plaza.
At a Glance
- Offices
Gregory Edwards, Senior Principal, Transportation
I work with communities to develop successful transportation facilities that meet the needs of all users and the surrounding environment.
We’re better together
-
Become a client
Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.
-
Design your career
Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.