Advanced Search Options
Unsignalized Intersection Improvement Guide - Practical guidance for improving the safety, mobility, and accessibility at unsignalized intersections.

Treatment Alternatives Filter

How to use The Filter

To obtain a more tailored listing of potential UIIG treatments for the intersection of interest, answer one or more of the following questions and click on the GET TREATMENTS button below. The treatment alternatives stemming from the user’s responses will be presented at the bottom of the page. Click on a treatment name to view its corresponding description sheet.

In what type of area is the intersection located?

Urban Central Business District
Urban Other
Not Applicable
What is the approximate vehicular volume along the major road (expressed in average daily traffic [ADT])?

400 or less
between 400 and 5,000
between 5,000 and 10,000
More than 10,000
Not applicable
How are the major road approaches characterized?

Single Lane
Multi Lane
Not Applicable
What specific crash types are being targeted at the intersection?

Opposing left turn
Rear-end (major road)
Rear-end (minor road)
Sideswipe, same direction
Sideswipe, opposite direction
Single vehicle / run off road
What problem type(s) may exist at the intersection?

Inappropriate intersection traffic control
Inadequate visibility of intersection or regulatory traffic control devices
Inadequate intersection sight distance
Inadequate motorist guidance
Excessive intersection conflicts
Vehicle conflicts with non-motorists
Poor operational performance
Misjudgment of gaps
Non-compliance with intersection traffic control devices
What general treatment types will be considered at the intersection?

Traffic Control Devices
Geometric improvements
Roadside/ shoulder
Pavement surface
Other engineering

Treatment Results Listed Here...