Final answer:
The Adopt-A-Highway program is the initiative where volunteers help keep highways clean, which reflects a collaborative effort between the community and government programs for neighborhood clean-up.
Step-by-step explanation:
The program that allows volunteers to take responsibility for keeping a section of the highway trash-free is the Adopt-A-Highway program. This initiative is a common example of how government programs support neighborhood clean-up efforts. Through the Adopt-A-Highway program, individuals, organizations, or businesses can contribute to the cleanliness and aesthetics of local highways. In return for their service, participants often receive recognition in the form of a sign with their name or group's name displayed along the stretch of road they maintain, encouraging a sense of community involvement and responsibility.