Jason's Law - Directs the Secretary of Transportation to: (1) implement a pilot program to allocate funds to states, metropolitan planning organizations, and local governments that submit an application approved by the Secretary for eligible projects to establish long-term parking facilities for commercial motor vehicles (trucks) on the National Highway System; and (2) give priority to applicants that demonstrate a severe shortage of truck parking capacity and whose proposed projects are likely to have positive effects on highway safety, traffic congestion, or air quality.