The proximity-to-transit indicator classifies municipalities into seven categories based on residents’ relative access to public transportation. The scores represent municipal averages of the U.S. Environmental Protection Agency’s ranked proximity-to-transit variable, D4A_Ranked, which ranges from 1 to 20. Higher scores generally indicate that a larger share of residents live within convenient walking distance of public transit, while lower scores indicate limited or no access to fixed-route transit services.

Unlike the complete National Walkability Index, proximity to transit measures only one dimension of accessibility. A municipality may provide frequent transit service while lacking connected street networks, mixed land uses, or pedestrian infrastructure. Likewise, many smaller municipalities receive low transit scores because fixed-route transit is unavailable, even if local neighborhoods remain highly walkable.

Classification Categories

• Very High Transit Accessibility (17.32–20.00): Municipalities where most residents have excellent access to public transportation through frequent bus, rail, subway, streetcar, or other transit services. Transit is a practical transportation option for many daily trips.
• High Transit Accessibility (14.60–17.31): Municipalities with strong transit availability and broad coverage. Most residents can reach transit stops within a reasonable walking distance, providing convenient alternatives to automobile travel.
• Above Average Transit Accessibility (11.88–14.59): Municipalities with moderate transit coverage serving many neighborhoods and activity centers. Transit is available for a substantial portion of residents, although service may be less frequent or geographically limited than in higher-scoring communities.
• Moderate Transit Accessibility (9.16–11.87): Municipalities where transit serves selected corridors, employment centers, or urban districts, but coverage remains inconsistent across the community. Many residents continue to rely primarily on private vehicles.
• Below Average Transit Accessibility (6.44–9.15): Municipalities with limited transit service or relatively few residents living within walking distance of transit stops. Public transportation plays only a minor role in everyday travel.
• Low Transit Accessibility (3.72–6.43): Municipalities with minimal transit coverage, infrequent service, or highly localized routes. Most daily trips require automobile travel due to limited public transportation options.
• Very Low Transit Accessibility (1.00–3.71): Municipalities with little or no fixed-route public transit. Residents are largely dependent on private automobiles because transit service is unavailable or inaccessible.

Planning Implications

Proximity to transit is an important measure of accessibility because public transportation expands access to employment, education, healthcare, shopping, and other daily destinations beyond walking distance alone. Transit accessibility also supports multimodal transportation by allowing walking and transit to function together as complementary travel modes (Cervero & Kockelman, 1997; Ewing & Cervero, 2010).

Higher-scoring municipalities generally provide:

• Better access to employment centers, schools, healthcare, and commercial districts through public transportation.
• Greater transportation choice beyond private automobile ownership.
• Reduced automobile dependence and lower household transportation costs.
• Improved mobility for residents who cannot drive, including older adults, youth, and individuals with disabilities.
• Greater opportunities for transit-oriented development and compact urban growth.
• Stronger integration between pedestrian networks and public transportation.
• Supports transportation equity for households without access to automobiles.
• Helps identify opportunities for transit-oriented development and infill redevelopment.

Lower-scoring municipalities may improve transit accessibility by expanding fixed-route transit service, increasing service frequency, improving pedestrian access to transit stops, coordinating land-use planning with transit investments, and encouraging higher-density mixed-use development around transit corridors. Transit accessibility also benefits from safe sidewalks, accessible crossings, bicycle facilities, and first- and last-mile connections that allow residents to comfortably reach nearby transit stops.

However, transit accessibility alone does not guarantee walkability. Residents must also be able to safely and conveniently reach transit stops through connected pedestrian infrastructure and supportive land-use patterns.

Understanding Municipal Transit Accessibility

Municipal proximity-to-transit scores provide a consistent way to compare one component of accessibility across communities. The data used in this analysis represent municipal averages of the EPA’s ranked transit-accessibility variable rather than direct measures of transit frequency or ridership.

For example, several municipalities with extensive transit systems receive very high scores, including Philadelphia (18.85), New York (18.48), Minneapolis (18.41), Washington, D.C. (18.28), Chicago (18.16), Boston (18.09), San Francisco (18.03), and Newark (18.03). These municipalities generally benefit from extensive rail and bus networks serving large portions of their populations.

In contrast, many suburban and rural municipalities receive the minimum ranked value of 1.00 because they have no fixed-route transit or very limited transit accessibility. The EPA assigns all block groups with no transit access a rank of 1, although a rank of 1 does not necessarily indicate a complete absence of transit in every case. Accordingly, these low scores often reflect limited or nonexistent transit service rather than deficiencies in neighborhood design or pedestrian infrastructure.

Municipal averages should therefore be interpreted carefully. A single score may conceal substantial variation within a municipality, where central neighborhoods enjoy frequent transit service while peripheral areas have limited or no access. Neighborhood-level analysis provides a more detailed understanding of where transit accessibility is strongest and where service gaps remain.

Geographic Patterns in Municipal Transit Accessibility

Municipal transit accessibility follows recognizable regional patterns that reflect historical investment in public transportation, metropolitan size, and urban development.

• Northeast Corridor: Municipalities from Boston to Washington, D.C. consistently record the nation’s highest transit-accessibility scores due to extensive commuter rail, heavy rail, subway, light rail, and bus systems that serve dense urban populations.
• Great Lakes and Upper Midwest: Older industrial cities such as Chicago, Minneapolis, St. Paul, Detroit, Cleveland, Toledo, Pittsburgh, and St. Louis generally maintain high transit accessibility through long-established public transportation networks.
• West Coast: Municipalities including San Francisco, Oakland, Seattle, Portland, Los Angeles, Sacramento, and San Diego benefit from relatively strong transit systems supported by regional rail, bus rapid transit, and expanding light rail networks.
• Sun Belt: Transit accessibility varies considerably across rapidly growing metropolitan areas. While central cities such as Miami, Atlanta, Dallas, Houston, El Paso, and San Antonio receive relatively high scores, many surrounding suburban municipalities have limited or no fixed-route transit service.
• Rural Areas and Small Communities: Many smaller municipalities across the United States receive very low transit-accessibility scores because public transportation systems are either limited or absent. In these communities, residents typically rely on private automobiles for most daily travel.

Within metropolitan areas, central cities and older urban neighborhoods generally provide substantially greater transit accessibility than recently developed suburban communities. This pattern reflects decades of transit investment concentrated in established urban areas and the automobile-oriented growth that characterized much postwar suburban development.

Relationship to Walkability

Transit accessibility and walkability are closely related but measure different aspects of the built environment. Nearly every public transit trip begins and ends with walking, making pedestrian infrastructure essential for successful transit systems. Well-connected sidewalks, safe street crossings, and compact land-use patterns allow residents to comfortably reach transit stops and complete their trips without relying entirely on automobiles.

For this reason, the National Walkability Index incorporates proximity to transit alongside street connectivity and employment mix. Together, these measures provide a more comprehensive understanding of how effectively communities support walking and multimodal transportation than any single indicator alone.

Overall Pattern

Municipal proximity to transit reflects both transportation investment and patterns of urban development across the United States. Older metropolitan regions with long-established transit networks generally achieve the highest scores, while suburban and rural municipalities often record lower values due to limited transit availability. Although transit accessibility represents only one component of walkability, it plays a critical role in expanding transportation options, improving access to everyday destinations, and supporting more sustainable patterns of urban development. When evaluated alongside street connectivity and land-use diversity, proximity to transit provides a more complete picture of how the built environment supports pedestrian accessibility and multimodal transportation.