MISSION, Kan. (AP) — Proponents of expanding passenger rail service through Kansas, Oklahoma and Texas hope an anticipated influx of federal infrastructure funding will get the the long-discussed route off the ground.

The project, which is among 39 new routes that Amtrak has proposed, calls for extending the Heartland Flyer. The train now travels south from Oklahoma City in the morning and returns in the evening, with an afternoon layover in Fort Worth, Texas.

With the expansion, one daily trip would start and end farther north in Newton, Kansas, in the early morning, traveling over tracks own...