Oregon Department of Transportation, Highway Division

Rule Rule 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.
Source

Last accessed
Jun. 8, 2021