The proposed project is located in Pima County on Interstate 19 (I-19) between mileposts 60.52 and 61.62, in Tucson. The work consists of improvements to the Irvington Road TI, including but not limited to constructing a new ramp, widening existing ramps, milling and replacing existing asphaltic concrete on Irvington Road with new asphaltic concrete, removing the existing bridge and constructing a new bridge. The work also includes constructing retaining walls, concrete barriers, storm drains, guardrails, landscaping, erosion control, signing, pavement marking, lighting, and other miscellaneous work.