A trio of female truck drivers lost their workplace harassment and constructive discharge suit against CRST Expedited Inc. July 15 because the trucking company responded adequately to their complaints.

Cathy Sellars, Leslie Fortune, and Claudia Lopez claimed they endured lewd comments, unwanted touching, and threatening behavior from male co-drivers while on the road. CRST addressed each complaint by designating the individual male drivers as “male only,” ensuring they wouldn’t co-drive with women.

The company should have taken bolder steps to prevent future harassment by other male drivers, the women said.

But the law doesn’t require employers to anticipate their employees’...