LINCOLN, Neb. (AP) — A Colorado highway safety official says Nebraska should not wait for marijuana to become legal before acting to keep drugged drivers off the roads.

Glenn Davis, highway safety manager for the Colorado Department of Transportation, and others spoke Tuesday at a summit on drugged driving hosted by the Nebraska Office of Highway Safety and AAA.

Davis said that like Nebraska, Colorado consolidates bans on driving while intoxicated and driving while drugged, making it difficult to distinguish between arrests.

Phil Tegeler, executive director at The Bridge Behavioral Health, who spoke on a panel with state Attorney General Doug Peterson, said that there is no widely accepted cutoff for drugs similar to blood-alcohol limits.

Susan DeCourcy with the National Highway Traffic Safety Administration said more law enforcement agencies will begin to use saliva testing devices during the next five years.