IHSDM: Intersection Review Module

The intersection review module performs a diagnostic review to systematically evaluate an intersection design for typical safety concerns.

The diagnostic review component is an expert system that leads the user through a systematic evaluation of an existing or proposed intersection geometric design to identify potential safety concerns and possible treatments to address those concerns. The review considers design issues including:

• Intersection configuration: multileg intersections, skewed intersections, offset-T intersections, and more than one minor-road approach on the same side of the major road
• Horizontal alignment: intersection on horizontal curve, curve on intersection leg, and approach alignment differing between opposing approaches
• Vertical alignment: intersection on crest vertical curve, crest or sag vertical curve on intersection approach, steep grade through intersection, and continuity of minor-road profile through intersection
• Intersection sight distance

A policy review component is planned that will check the following intersection design elements for compliance with design policy: corner radius, turn lane design, intersection angle, and intersection sight distance triangles.

The intersection review module can provide useful input to project scoping, preliminary engineering, and design review.

See IHSDM Library for References.