TOPEKA, Kan. (AP) -- The Kansas Department of Transportation is warning candidates and their supporters that the state doesn't allow political signs to be posted alongside highways.

The agency says the rule applies not only to Kansas routes and U.S. highways but to interstates in the state's 9,500-mile system.

KDOT is warning that if its crews find political signs in the right of way for a highway or interstate, they'll confiscate them immediately, without notice. Crews will then take the signs to the nearest KDOT regional office and keep them until they are claimed.

If signs are claimed, the owner will have to agree not to post them alongside highways again. KDOT says it will dispose of signs that aren't claimed after the November elections.