Any portion of a roadway at an inter-section or elsewhere that is distinctly indicated for pedestrian crossing by lines or other markings on the surface of the roadway that conform in design to the standards established for crosswalks under ORS 810.200. Whenever marked cross- walks have been indicated, such cross- walks and no other shall be deemed lawful across such roadway at that intersection. Where no marked crosswalk exists, a crosswalk is that portion of the roadway described in the following:

A. Where sidewalks, shoulders or a combination thereof exists, a crosswalk is the portion of a roadway at an intersection, not more than 20 feet in width as measured from the prolongation of the lateral line of the roadway toward the prolongation of the adjacent property line, that is included within:

1. The connections of the lateral lines of the sidewalks, shoulders, or a combination thereof on opposite sides of the street or highway measured from the curbs or, in the absence of curbs, from the edges of the traveled roadway; or

2. The prolongation of the lateral lines of a sidewalk, shoulder, or both, to the sidewalk or shoulder on the opposite side of the street, if the prolongation would meet such sidewalk or shoulder.