Composite Arch Bridges

The Composite Arch Bridge System, commonly known as Bridge In A Backpack®,  has been used in 28 bridges in the US and beyond. This technology accelerates bridge construction time, reduces life cycle costs, and has received top industry recognition.

The Composite Arch Bridge System has received the following rewards:

  • 2015 White House Transportation Champion of Change Award by the U.S. Department of Transportation and the White House Office of Public Engagement
  • 2011 Charles Pankow Award for Innovation by the American Society of Civil Engineers (ASCE)
  • 2011 Engineering Excellence Awards by the American Council of Engineering Companies (ACEC)
  • 2010 Most Creative Product Award by the American Composites Manufacturers Association (ACMA)


Videos available:

The Composite Arch Bridge System is a lightweight, corrosion-resistant system for short to medium span bridge construction. The system uses FRP composite arch tubes which act as reinforcement and formwork for cast-in-place concrete. The arches are easily transportable, rapidly deployable, and do not require the heavy equipment or large crews needed to handle the weight of traditional construction materials.

The patented FRP system has been tested with advanced structural characterization, predictive modeling, and fatigue testing. Additionally, with environmental durability tests for UV, fire, and abrasion resistance were conducted.

Our innovative composite bridge system:

  • Coincides with the American Association of State Highway and Transportation Officials (AASHTO) code
  • Lowers construction costs
  • Extends structural lifespan up to 100 years
  • Serves as a sustainable alternative to traditional construction methods
  • Features designs that are engineered to exceed AASHTO load standards for single span bridges from 20 feet to over 65 feet

Advanced Infrastructure Technologies is a privately held company licensed by the University of Maine to produce these bridges.

AIT logo


Selection of Composite Arch Bridge Projects Completed by Advanced Infrastructure Technologies:

Loutsis Creek Bridge in Duvall, WA – Completed 2020
50’ Span, 12 Arches

Wyalusing, PA – Completed 2019
56’ Span, 13 Arches

Lagrange, ME – Completed 2012-2013
36.0’ Span, 13 Arches

Lagrange, ME - 2012-2013 36.0’ Span, 13 Arches


Ellsworth, ME – Completed 2012-2013
34.3’ Span, 11 Arches



Farm Access Overpass in Caribou, ME – Completed 2011
54.0’ Span, 22 Arches

20131120 Caribou Finished (5)


Fitchburg, MA – Completed 2011
37.5’ Span, 15 Arches



Royal River Bridge in Auburn, ME – Completed 2010
38.0’ Span, 13 Arches

Royal River Bridge in Auburn, ME - 2010


Perkins Bridge in Belfast, ME – Completed 2010
48.0’ Span, 16 Arches



Jenkins Bridge in Bradley, ME – Completed 2010
28.5’ Span, 14 Arches

Bradley winter (1) copy


McGee Bridge in Anson, ME – Completed 2009
28.0’ Span, 9 Arches

20090919 McGee - Finished (47)