1. Users: This includes passengers, drivers, and pedestrians who use the transportation system directly.
2. Governments: Local, state, and federal bodies are responsible for regulating transportation systems, setting policies, and funding projects.
3. Transportation agencies and providers: Public transportation agencies, private transportation providers, and infrastructure operators like airports, seaports, and highways.
4. Developers and builders: These include architects, engineers, and contractors who design and construct transportation infrastructure.
5. Advocacy groups: Advocacy organizations work to influence transportation policies and to ensure that the needs and interests of the public are served.
6. Environmental groups: Organizations concerned with sustainability and the environment can influence transportation planning and policies.
7. Businesses and industries: Companies and industries that rely on transportation for commerce and trade.
8. Neighborhood and community groups: These groups represent local interests and can have a significant impact on transportation planning and development within their communities.
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