ORS § 105.855
Whenever after January 1, 1973, a city or mass transit district, whether or not acting pursuant to its police powers or condemnation authority, restricts use of the street traffic lane immediately adjacent to a sidewalk abutting commercial property to public conveyances and the existing access to that property by the general public by means of private conveyances is thereby prohibited or materially restricted for more than six hours in any 24-hour period, the city or mass transit district shall be liable for and shall pay the difference between the fair market value of the property prior to the restriction and the fair market value of the property subsequent to the restriction, taking into account any special benefits to the property resulting from improvements made by the city or mass transit district in connection with the restriction. The fact that other access to the property from a public way is available shall relieve the city or mass transit district from liability if the other access is reasonably equal to the access prohibited or materially restricted.
ORS 105.855