Add to ORKGSenate Constitutional Amendment 18. Adds Section 6 to Article XVI of Constitution. Authorizes issuance and sale of $10,000,000 State bonds, proceeds to be expended by California Highway Commission to pay such portion of cost of acquisition of rights of way for railroad grade separations and acquisition, construction and improvement of railroad grade separations upon State highways within State highway system as may be apportioned to State by State Railroad Commission; defines railroad grade separation as any crossing, and approaches thereof, between state highway and tracks of commercial interurban or other railway by whatsoever power operated