- Voter Information - Marylandmatters.org
- MdQI's Construction & Engineering Career Day
- State Asphalt Associations with Links
- Maryland Chamber of Commerce
- The Maryland Highway Contractors Association
- Maryland State Highway Administration
- Asphalt Institute
- American Traffic Safety Services Association
- American Association of State Highway Officials
- Federal Highway Admin TechCenter-Pavement/Bridge/Safety/Traffic
- Transportation Research Board
- Asphalt Recycling & Reclaiming Association
- National Asphalt Pavement Association (NAPA)
- The Asphalt Contractor Online
- National Department of Transportation
- The Turner-Fairbank Highway Research Center
- Transportation Research Board
- The Asphalt Museum
- The National Center for Asphalt Technology
- Construction Equipment On Line
- Asphalt Pavement Alliance (APA)
- beyondRoads.com
- American Highway Users Alliance
- The Road Information Program
- American Road & Transportation Builders Association (ARTBA)
- Maryland Aggregates Association, Inc.
- Frickhistory.com
