Save TRANSIT Coalition
- Advocacy group working to get the General Assembly to dedicate SEPTA and Pennsylvania public transit funding.
- http://www.savetransit.org/

Pennsylvania Rails to Trails
- Interactive maps allow for easy location of trails; also a searchable database of active and defunct rail lines.
- http://www.dcnr.state.pa.us/railtrails/

Maryland and Pennsylvania Railroad Preservation Society
- Aims to preserve the heritage of the renowned and historic "Ma & Pa Railroad".
- http://www.maandparailroad.com

Hawk Logistics
- Nationwide transporter specializing in the transportation and disposal of all types of hazardous and residual wastes.
- http://www.hawklogistics.com/

Route 21 Corridor Improvement Project
- A highway project for rebuilding Traffic Route 21 (S.R. 0021) between Waynesburg and Uniontown. Includes progress reports, maps and photographs.
- http://rebuild21.com/

PA DMV
- General information of the department of motor vehicles. Site is not affiliated with the Commonwealth of Pennsylvania Department of Motor Vehicles.
- http://www.padmv.org/

PennDOT Electronic Bidding System
- Information for contractors on road construction proposals. Includes notice to contractors, bid schedule of prices and addenda, proposal text and real-time bid letting results.
- http://www.dot.state.pa.us/cms/ebs/index.htm

Coalition for Alternative Transportation
- Dedicated to curbing reliance on the automobile.
- http://www.car-free.org/

The American Society of Transportation & Logistics
- Professional organization founded in 1946 by a group of industry leaders to insure a high level of professionalism and promote continuing education in the field of transportation and logistics.
- http://www.astl.org/

The Pennsylvania Transportation Institute
- Multidisciplinary research institute that conducts innovative and relevant research directed toward current and future transportation needs.
- http://www.pti.psu.edu/