<Li> <P> Railroad crossing (one version), MUTCD R15 - 1 . </P> </Li> <P> Railroad crossing (one version), MUTCD R15 - 1 . </P> <Li> <P> Do not enter, MUTCD R5 - 1 . </P> </Li> <P> Do not enter, MUTCD R5 - 1 . </P>

Is a do not enter sign a regulatory sign