LEAP-Trans, formerly known as Hwy-Opps, estimates the magnitude of potential opportunities for regional business expansion and attraction resulting from highway or rail projects that affect a community or region's market access and connections to outside areas. It is a special application of the EDR-LEAP software that assesses potential economic growth implications of changes in a broad range of local infrastructure and business conditions.

LEAP-Trans analyzes the business growth and attraction benefits associated with new or enhanced highway or rail network linkages that affect access to labor markets, customer markets, supplier markets, transportation terminals (including airports, marine ports, intermodal rail transfer facilities and highway interchanges), international borders and trade facilities, or commercial and industrial centers. These types of business access benefits are in addition to the simple travel time and cost savings benefits that are traditionally recognized in transportation planning models.

LEAP-Trans has been used widely as a stand-alone tool for communities to identify economic development opportunities associated with local access improvements, and as an adjunct to the REMI economic model to cover implications of improved transportation network connectivity. It is now a component of TREDIS, the Transportation Economic Development Impact System, which analyzes the full economic impacts and benefit-cost implications of transport projects.

Models to Predict the Economic Development Impacts of Transportation Projects, by G.Weisbrod, 2008