Grade Separation

12/01/25

“How can we separate different transportation paths by placing them at different heights?”

Transportation routes are one of the most fundamental parts of how people move around, whether it’s a pedestrian street, a set of train tracks, or a highway. However, sometimes we may not have enough space for all paths to run together. So how can we use our engineering and planning mindsets to solve this? Well, what if we were to place different transportation paths at different heights? With Grade Separation, the same space can hold more potential paths. Examples of grade separation include the pedestrian and car bridges over 580 in Oakland, the bicycle lanes in New York City’s Rockaway Corridor, and the NH 248-BB in India.