OAR 734-020-0130: Criteria for One-Way Operation for Trucks and Buses

(1) A field investigation shall be made for each section of highway on which one-way operation may be required. The following field data shall be recorded: (a) Curb to curb width for the bridge tunnel or underpass; (b) Sight distance on both approaches based on geometric design and/or other obstructions; (c) Typical cross-sections; (d) Location of the striped centerline with respect to pavement edge or curb; and (e) Approach speeds. (2) The following cases may be considered: (a) If curb to curb distance or roadway width is more than 20 feet and the painted centerline is centered in the roadway, one-way operation will not normally be established if there are no speed restrictions (i.e., 55 MPH maximum basic rule under 55 maximum); (b) Curb to curb or roadway width 20 feet or less may be considered for one-way operation; (c) Any consideration of one-way operation shall consist of a review of the past accident history for the section involved including structural damage accidents; (d) Sections of existing roadway already signed for one-way truck and bus operation shall be reviewed based on these rules and engineering judgment. No existing one-way operation for trucks and buses shall be removed without prior approval of the Chief Engineer; (e) A written report shall be prepared. (3) The Traffic Engineer shall maintain a complete file of all investigations and reports and a record of approved sections on the State Highway System. As needed, a report under delegated authority will be prepared for the Chief Engineer by the Traffic Engineer.