The U.S. Department of Agriculture’s Forest Service released a report in May 2011 that explores the benefits and challenges encountered with the use of lightweight, low-maintenance, easily constructed fiber-reinforced polymer trail bridges in remote areas where the weight of conventional bridge-building materials such as steel, concrete, or timber make their use impractical.

Fiber-reinforced polymer (FRP) bridges, commonly called fiberglass bridges, have been constructed in Asia, Europe, and North America. The advantages of composites in trail bridge applications
include their light weight, high strength, resistance to corrosion, and fast, easy installation. These properties make them competitive with standard bridge materials in situations where access
and construction present difficulties.
A Guide to Fiber-Reinforced Polymer Trail Bridges | 39.25MB PDF