The Allegheny Trail Alliance has contracted trail user and business surveys to better understand the economic impacts that the Great Allegheny Passage (GAP) brings to the region. The 2015 survey reports almost one million trail users and found that 62% of trail users had an overnight stay with an overnight spending average of $124.58. Businesses experienced an increase in trail user traffic from 34% in 2013 to 41% in 2014. Forty percent of the businesses planned to expand and of those reported to expand 67% attributed their expansion to the impact from the trail.