1) Alameda-Contra Costa Transit District
2) City of Irvine, CA
3) City of Palo Alto, California
4) City of Rancho Cucamonga, CA
5) City of Tempe, Arizona
6) City of Torrance, CA
7) Clark County Public Transportation Benefit Area dba C-Tran
8) County of Orange, California
9) County of Sonoma, CA
10) CRH Americas Materials, Inc.
11) Dallas Area Rapid Transit (DART)
12) Greater Cleveland Regional Transit Authority
13) Napa County, CA
14) National Asphalt Pavement Association
15) Port of Oakland
16) San Diego County
17) Santa Clara Valley Transportation Authority
18) Sonoma-Marin Area Rail Transit District
19) Tampa Bay Area Regional Transit Authority
20) Washington County, Oregon
21) Wayne County Airport Authority