the Arcadia Wildlife Sanctuary held by the Massachusetts Audubon Society, form a long wildlife corridor stretching across the Connecticut River. Recently, there has been a notable grassroots effort to reclaim Springfield's once easily accessible and pedestrian-friendly waterfront, which is now separated from the city by the eight-lane, elevated highway Interstate 91. In 2010, the Urban Land Institute presented a plan that suggested how Springfield could reunite with its greatest natural resource, the Connecticut River. See also Knowledge Corridor Massachusetts geography Metropolitan Springfield Pioneer Valley Transit Authority Western Massachusetts References External links Greater Springfield Convention & Visitors Bureau Pioneer Valley Planning Commission Pioneer Valley Local First Geography of Springfield, Massachusetts Landforms of Franklin County, Massachusetts Landforms of Hampden County, Massachusetts Landforms of Hampshire County, Massachusetts Regions of Massachusetts Valleys of Massachusetts