Amends the Department of Transportation Law of the Civil Administrative Code of Illinois. Requires the Secretary of Transportation to establish a program through which the Secretary shall award grants to eligible entities for projects that facilitate travel by public transportation to public outdoor recreation sites for outdoor activities, including hiking, biking, boating, picnicking, hunting, fishing, wildlife observation, or other nature-based activities. Provides that the Secretary shall offer grants through the Transit to Trails program on an annual basis. Requires the Department of Transportation to adopt rules necessary to implement and administer the program. Provides that, in considering grant applications, the Department shall prioritize projects with demonstrated intent to enhance access to outdoor recreation opportunities for populations in greatest need of improved access to outdoor nature-based recreation. Requires the Department to provide technical assistance in preparing grant applications to applicants upon request. Provides that implementation of the grant program is subject to appropriation by the General Assembly.