Segmental bridge construction offers the advantages of repetitive construction procedures, minimum impact to traffic and the environment during construction, economical construction, and a durable structure.

Segmental construction can be used in a variety of difficult site conditions. Piers can be placed on small footprints, superstructures can go over natural hazards and community landmarks, and segmental bridges may be used on a small radius such as curved highway access ramps, as well as large-radius bridges.

Their slender piers and long, shallow superstructures make concrete segmental bridges aesthetically pleasing, and the concrete can be colored to blend into the environment.

The use of precast concrete segments has the advantage that the superstructure can be erected at a faster rate compared to cast-in-place construction. Precast concrete segments are built using either a short-line or long-line method while the substructure is being built.

Precast segments are usually erected using one of three methods:

1. Span-by-Span: In the span-by-span method, an entire span is assembled, post-tensioned and erected so that it is self-supporting before the next span is erected. The method is appropriate for span lengths up to about 150 feet.

2. Balanced Cantilever: In this method, the superstructure is erected by cantilevering out from opposite sides of the pier. The segments are added either at the same time or alternately to each cantilever to maintain a relatively balanced system. The balanced cantilever method is most economical for span lengths between about 160 and 500 feet.

3. Progressive Placement: This method involves starting at one end of the bridge and erecting segments in sequential order. This is particularly suitable for environmentally sensitive areas or where construction access is limited. Progressive placement usually requires the placement of temporary piers at the middle of each span and is suitable for span lengths of 100 to 300 feet.