OMAHA, Neb. (AP) — A railroad union has rejected a deal with BNSF that would have allowed one-person crews under certain circumstances.

A unit of the Sheet Metal, Air, Rail and Transportation Workers union said its members voted the contract down.

The deal would have allowed BNSF to use one-person crews on tracks where a system capable of stopping the train remotely had been installed. The Fort Worth, Texas, railroad says it has Positive Train Control systems installed on about 60 percent of its 32,500 miles of track.

But trains that carry hazardous materials, such as crude oil and chemicals, would have continued to have two-person crews.

BNSF Vice President of Labor Relations John Fleps says the railroad will respect the wishes of union members who decided not to support one-person crews now.