Transportation & Traffic Engineering

Achieving the proper balance between mobility; pedestrian, bicycle and vehicular safety; and preservation of community character is often the challenge we face today as transportation engineers in the urban environment. In addressing the efficient movement of people and goods for the vitality of our local and regional economies, we can no longer afford to solve our congestion concerns by solely constructing more system capacity.

Today’s fiscal realities demand more creative approaches that consider more fully the interrelationships between land use and transportation. Our solutions need to explore a wide range of alternatives that can make our current roadway networks more efficient and better able to accommodate a broader range of users beyond just motorized vehicles, i.e. pedestrians, bicyclists, and transit riders.

What began 10-12 years ago as Context Sensitive Design, has now evolved into the Complete Streets and Green Streets movements – both of which are transforming our transportation facilities into more community-friendly and environmentally responsible infrastructure systems.

At Sebago Technics, we embrace a holistic approach to transportation planning, engineering, and operations in urban settings. Our transportation engineers routinely collaborate with in-house land-use planners and landscape architects to develop designs that achieve superior results in terms of mobility, safety, aesthetics, and environmental quality. 

Whether it is transforming a major arterial through the Thornton Heights neighborhood in South Portland into a Complete Street with stormwater treatment facilities, or just implementing a “Road Diet” on East Broadway leading to Southern Maine Community College in the same community to allow room for formal bike lanes for increased safety of the student population, Sebago’s staff is passionate about developing design solutions that meet the needs of a wide variety of system users.

South Portland


  • Corridor Studies
  • Traffic Impact Studies for New Developments
  • Access Management Analyses
  • Traffic Modeling and Simulations
  • Traffic Peer Reviews
  • Safety Analyses


  • Roadways and Intersections
  • Railroads
  • Traffic Signals and Signal Systems
  • Bicycle and Pedestrian Facilities
  • Intermodal Facility Planning and Design
  • Maintenance of Traffic During Construction
  • Alternative Project Deliveries (Design/Build and CMGC)


  • Traffic Signal Systems Management

At the state level, Sebago’s Transportation Engineers are attuned to the growing demands for timely delivery of major projects. Our staff has been actively involved in several different Alternative Delivery Methods recently aimed at accelerating project development.

The design of the new $160M Sarah Mildred Long Bridge between Kittery, ME and Portsmouth, NH for MaineDOT and NHDOT is an example of Construction Management General Contractor (CMGC) – Sebago performed all of the civil engineering associated with the new vehicular and railroad bridge approaches. 

Sebago also recently provided Maintenance of Traffic design services to PCL Civil Constructors on a $12M “lateral slide” CMGC bridge project in Hartford, VT for VTrans.  We are also providing civil design and traffic management services to Figg Bridge Engineers and PCL on a $60M Design/Build bridge replacement project on I-91 in Brattleboro, VT.

Large or small – state-level or community level – Sebago is equipped and experienced to offer you sage advice with regard to your transportation needs. While our talents are predominantly focused on planning and design activities, our skills don’t end there. We also have a post-construction traffic signal system operations practice that is “unique” to the industry.

Today’s traffic signal system technology is migrating to centrally managed networks utilizing high-speed communications. This arrangement provides a more efficient means of controlling systems and monitoring their real-time performance with regard to traffic flow against changes in travel demand.  These systems also can self-diagnose equipment problems as they occur, which improves maintenance response times.

Our Traffic Engineers are skilled in operating these systems and are providing this service to a growing number of communities in northern New England.

    Privacy Policy  |  Sitemap