Short Line is a brand name for three different Coach USA companies, Hudson Transit Lines, Hudson Transit Corporation, and Chenango Valley Bus Lines that provide local, commuter and intercity bus service in lower New York State, primarily along the Route 17 and Southern Tier corridor.

[4] In June 2024, Coach USA filed for Chapter 11 bankruptcy, blaming corporate impact caused by the COVID-19 pandemic.

In addition, under contract to the New York State Department of Transportation and Rockland County Department of Public Transportation, ShortLine provides commuter bus service from Orange and Rockland Counties to White Plains and Tarrytown.

Some schedules may serve only portions of the line, skip some stops, or may service multiple routes.

On June 12, 2017, in New York City, a Hudson Transit Lines bus was involved in a crash in which driver Dave Lewis ran over and killed bicyclist Dan Hanegby, an Israeli-American athlete and cycling enthusiast.