Old and New: Elevated and Box Tunnel with Minimal Excavation

NYC Manhattan West Side Highway- Old & New

new box tunnel beneath Riverside Drive boulevard extension

Old= Elevated Viaduct

New= Submerged Tunnel Box

Least expensive when done with no or minimal excavation, as respectively with a tunnel box atop the existing SE Freeway segment between 11th Street and Barney Circle- Pennsylvania Avenue SE, and with an extension of that freeway to RFK Stadium.

Washington, D.C. Barney Circle

Existing SE Freeway and immediate unbuilt extension involving no heavy excavation

Tunnel Box atop existing SE Freeway segment between 11th Street and Barney Circle

http://wwwtripwithinthebeltway.blogspot.com/2013/11/wasting-eastern-seeast-leg-freeway.html

http://wwwtripwithinthebeltway.blogspot.com/2014/09/a-se-freeway-plan-benifiting-greatest.html