Intersection Redesign

Design Compact Intersections

• Break complex intersections into multiple, compact ones.
• Minimize intersection size through the addition of curb extensions, plazas, and medians. Minimize vehicle turning speeds using medians, realignment, and small corner radii.

Simplify Geometry

• Bend streets so that they meet at as close to a 90-degree angle as possible.
• Maintain view corridors and sight lines for legibility and wayfinding.
• Align crossings with pedestrian desire lines and key destinations.

Analyze Networks

• Where traffic volume data reveals excess vehicle capacity, reduce the number of lanes along a corridor, consolidate excess turn lanes, and eliminate slip lanes.
• Reallocate space to medians, cycle infrastructure, or sidewalks.
• Integrate intersection design elements with the surrounding buildings and plazas.

Integrate Time and Space

• Restricting vehicle turns at acute-angled intersections with very low volumes saves signal time and improves safety. Provide curb extensions and medians.
• Align stop lines at all legs of the intersection to be perpendicular to the travel lanes, enhancing overall clarity and visibility for both vehicles and pedestrians.

Increase Pedestrian Space

• Reallocate space for pedestrians and cyclists. Widen narrow sidewalks and add cycle facilities.
• Assess and design the entire public realm in a holistic way to create one seamless pedestrian realm.
• Introduce transit stops and other facilities at appropriate locations.

Start with Vulnerable Users

• Realign pedestrian crossings to meet the pedestrian desire lines.
• Add pedestrian ramps and refuge areas at crossings.
• Reduce vehicle speeds through tighter turning radii and narrower travel lanes.
• Provide dedicated space for cyclists.