When the material used to make a bridge differs from that used to make the roadway, the road leading up to the bridge is compacted while the bridge tends to remain higher than the roadway. This can cause what Associate Professor Dante Fratta refers to as “the bump at the end of the bridge,” which can damage cars and can cause drivers to lose control of steering. Fratta is working with Professor Mike Oliva to overcome this “bump” by using geosynthetic reinforced soil (GRS) to build bridges. GRS combines layers of geosynthetic materials and compacted soil so that the soil can support weight without settling too much. This causes the bridge and pavement to deform at the same rate, eliminating the bump.