A:
Acoustics Facility - Expertise in measuring and evaluating noise generated by air, highway, and rail transportation [Department of Transportation (DOT), John A. Volpe National Transportation Systems Center]

C:
Cleanup (Brownfields) - Brownfields are abandoned, idled, or under-used industrial and commercial facilities where expansion or redevelopment is complicated by real or perceived environmental contamination [Environmental Protection Agency (EPA)]

P:
Passenger Rail - Environmental issues impacting the Federal Railroad Administration [Department of Transportation (DOT), Federal Railroad Administration]