An urban studies report estimated, on average, expanding and optimizing transit services produced an economic benefit of roughly $45 million a year by connecting urban areas. That figure ranged between $1.5 million and $1.8 billion based on the size of the city.
According to APTA, an investment of $10 million in public transportation generates about $32 million in increased business sales. Residential property values for homes located near public transit with high-frequency service performed 42% better on average. It was also found in the APTA report that for every $1 billion invested in public transportation, more than 50,000 jobs are created.
Because bigger cities have more people utilizing public transit infrastructure, they tend to benefit more. Looking at agglomeration more closely, a benefit of having more people in an area is to widen and diversify the labor force which in turn promotes economic growth. Agglomeration can be promoted.