1. (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:

   1. (a) Curb to curb width for the bridge tunnel or underpass;
   2. (b) Sight distance on both approaches based on geometric design and/or other obstructions;
   3. (c) Typical cross-sections;
   4. (d) Location of the striped centerline with respect to pavement edge or curb; and
   5. (e) Approach speeds.

2. (2) The following cases may be considered:

   1. (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);
   2. (b) Curb to curb or roadway width 20 feet or less may be considered for one-way operation;
   3. (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;
   4. (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;
   5. (e) A written report shall be prepared.
3. (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.

Statutory/Other Authority

ORS 184 & 366

Statutes/Other Implemented

ORS 810.030

History

2HD 6-1981, f. & ef. 10-2-81