What characteristic distinguishes a cellular joint seal from a compression joint?

The distinguishing characteristic of a cellular joint seal is its ability to allow movement in multiple directions. Cellular joint seals are designed to accommodate structural movements, such as expansion, contraction, and slight rotations that occur due to temperature changes or loads on the bridge. This flexibility is crucial for maintaining the integrity and longevity of the bridge while ensuring effective sealing against water and debris.

In contrast, compression joints are typically more rigid, designed to handle specific types of movements without accommodating the multi-directional flexibility that cellular seals offer. The materials and design of a cellular joint seal facilitate this adaptability, ensuring that the joint remains functional under varying conditions, which is essential in bridge safety inspections and maintenance.