SR28
Description:
This project involved the design of a directional ramp from S.R. 28 Southbound near the Heinz Plant to I-279 Southbound. The concept eliminated the need for three traffic lights by realigning two lanes to pass under the railroad structure to tie-in with I-279 Southbound. This resolved the level of service issues as well.
Design:
The design includes a simple span structure from SR. 28 over Madison Avenue Connector and a two-span curved girder structure over I-279 and the I-279 HOV lane (under I-579).
Services:
Our services included geotechnical, hydrology/hydraulics (H&H) , roadway, and structural engineering. Our innovative approach to alternate fill material allowed us to use shredded tires as fill materials. The benefits of using “tire shreds” for embankment fill are that they provide an environmentally sound method of disposing of a persistent waste product and support “Green Design” principles. This project demonstrated that waste tires can be disposed of safely and economically. Additionally, the superstructure was utilized from existing material at a department stockpile, allowing the span length to increase, thus allowing abutments to be shortened in height and allowing the district to appreciate substantial costs.
Award:
A&A was awarded the 2009 ASHE Pittsburgh Outstanding Highway Engineering Award for this project.
Services Details
· Clients Name: Pittsburgh City
· Location: 279 Southbound