Anchored Wall Advantages Along 1-95

Traveling from Maine to Florida, I-9S is the U.S.' longest North-South interstate and has been growing and expanding through the Mid-Atlantic. In Maryland, the 1-9S Express Toll Lanes projects created new toll lanes to relieve congestion and increase quality of life for numerous communities along the interstate, according to project owner, the Maryland Transportation Authority (MDTA). Many of these projects also included replacing or rehabilitating bridges and constructing new noise walls, as well as retaining walls, as I-9 S expands to accommodate the new lanes. The focus of this article is the 1-9S Express Toll Lane Northbound Extension from MD 43 to south of MD 1S2. This project contains 11 large retaining walls with some of these walls combined with noise walls. Many of these projects join other adjacent 1-9S toll lane expansions, which makes timing critical and scheduling very important. In this particular project, all of the major retaining walls were on one side of 1-9S and built in one phase that created scheduling and logistical challenges.