Composite Arch Bridges

The Composite Arch Bridge System, commonly known as Bridge-In-A-BackpackTM,  has been used in 23 bridges in the US and beyond. This technology accelerates bridge construction time, reduces life cycle costs and has received top industry recognition.

Awards received:

  • 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)

2016 Composite Arch Bridge Installation Map


Videos available:

The Composite Arch Bridge System, known as Bridge-In-A-BackpackTM, is a lightweight, corrosion resistant system for short to medium span bridge construction using FRP composite arch tubes that 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, along with environmental durability tests for UV, fire, and abrasion resistance.

Our innovative composite bridge system is part of the American Association of State Highway and Transportation Officials (AASHTO) code, lowers construction costs, extends structural lifespan up to 100 years, and is a sustainable alternative to traditional construction methods. All designs are engineered to exceed AASHTO load standards for single span bridges from 20 ft. to more than 65 ft.

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 by Advanced Infrastructure Technologies:

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)