Transportation plays a large role in the character of the Mill Creek Watershed, affecting the region’s land use, commerce and public health. From an infrastructure standpoint, the watershed contains (NEED NUMBER AND SOURCE) linear miles of roads, (NUMBERS) of railway tracks, as well as sidewalks, bikeways, and greenways. These highways include Interstates I-75, I-71, I-74, and I-275, which all pass through the watershed. Respectively located to the north and south of the Watershed, the Dayton International Airport and the Greater Cincinnati/Northern Kentucky International Airport provide another transportation option.
Both the four interstates and the many state, county, and local roads in the region handle a growing number of
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The total number of commuters within the two counties has increased from 424,574 in 1970 to 558,779 in 2000. The increase in traffic has led to congested roadways, increasing commute times and limiting pedestrian movement, or walkability. Through websites such as Walkscore.com, walkability can be measured by straight-line distance between the geographic center of a municipality and neighborhood amenities such as stores, schools and libraries. Such analysis suggests that the southern and eastern areas of the Watershed, consisting of Cincinnati and its surrounding suburbs, have more opportunities for pedestrian-based movement, compared to the northern and western areas of the Watershed.
The current response to the increase in automobile traffic is to widen existing roadways and increase the number of access points to highways. These improvements have occurred major roads, such as, State Route 4 in Fairfield, State Route 42 in West Chester, I-75, Cincinnati-Dayton Road, and the Butler County Highway. Mass-transit options in the watershed are limited to the Southwest Ohio Regional Transportation Association (SORTA) bus system, which services Hamilton county and parts of the surrounding counties. According to OKI, the SORTA service annually provides 29 million passenger trips. Other responses have tried to address the problem of increased congestion by moving away from increasing roadway access and