Click here for a map of the Terminally Blended Tire Rubber Asphalt sections detailed below.

2006 innovation test zones of 25.34 lane miles:

• Union Boulevard from about 600 feet north of Austin Bluffs Parkway to Academy Boulevard: This high-volume section was milled and overlaid with a 1½ inch layer of traditional dense graded asphalt followed by a one inch cap of terminal blend tire rubber asphalt. This mix used 10 percent tire rubber content and 3/8 inch aggregate.  
• Chelton Road from Airport Road to Marion Drive (one block south of Palmer Park Boulevard): This low-volume section was milled and overlaid with traditional asphalt followed by a one inch layer of tire rubber asphalt. This mix used 10 percent tire rubber content and 3/8 inch aggregate.
• Wooten Road from Platte Avenue to Galley Road: In this section, half of the road was milled and overlaid with new traditional asphalt, followed by a one inch layer of tire rubber asphalt. The other half of the road had a one inch layer of tire rubber asphalt placed over the top of the existing asphalt, after crack sealing the surface. This mix used 10 percent tire rubber content and 3/8 inch aggregate.
• Briargate Parkway eastbound from Lexington Drive to Union Boulevard: In this section a one inch layer of tire rubber asphalt was placed over the top of the existing surface. This mix used 10 percent tire rubber content and 3/8 inch aggregate.

2007 innovation test zones of 27.10 lane miles:

• All lanes on Union Boulevard from Pikes Peak Avenue to 1000 feet south of Austin Bluffs Parkway: In this section, as part of the Union Improvement Project, a 1¼ inch layer of tire rubber asphalt was placed over the top of a new 1 ½ inch layer of traditional asphalt. This mix used 15 percent tire rubber content and ½ inch aggregate.

2009 innovation test zones of 26.03 lane miles:

• Circle Rd from Janitell Rd to Airport Rd:  In this section, a 1 ¼ inch layer of tire rubber asphalt was placed over the top of 1 year old dense grade traditional asphalt.  This mix used 15 percent tire rubber content and a ½ inch, harder aggregate.
• Academy Blvd from 501' north of SH83/Kelly Johnson Blvd to Shrider Rd:  In this section of major arterial roadway, a 1 inch layer of tire rubber asphalt was placed over 1 year old existing asphalt.  This section also used the 15 percent tire rubber content in the mix and the ½ inch, harder type of aggregate.

2010 innovation test zones of 1.18 lane miles*:

• Voyager Parkway (Southbound) from the south side of Ridgeline Drive Intersection to 1000' southbound on Voyager Pkwy:  In this section, a 1 inch layer of tire rubber asphalt was placed over existing, crack filled asphalt.  This test section used 3/8 inch Slag aggregate, a by-product of the steel industry, and 15 percent tire rubber in the mix.  Slag is a 100% recycled material.  Combined with TBTRA oil, it makes this a 96% recycled material overall.
• Voyager Parkway (Northbound) from the north side of Jet Stream Drive Intersection to 890' northbound on Voyager Pkwy:  In this section, a 1 inch layer of tire rubber asphalt was placed over existing, crack filled asphalt.  This test section used a hard, 3/8 inch Granite aggregate, and 15 percent tire rubber in the mix.

* In 2010, the City will use TBTRA oil with a 5% Tire Rubber content for its Double Chip Seal program (7.56 LM) as well.