At-grade

Relating to or occurring at the same level or elevation as the surrounding ground surface. This term is most commonly used in engineering, construction, and transportation to describe features such as roadways, railway tracks, and pedestrian crossings that are built directly on the existing terrain without significant excavation or elevated structures. 'At-grade' construction prioritizes simplicity and cost-effectiveness, often being a preferred method in locations where the land is relatively flat and the required elevation changes are minimal. The absence of overpasses, underpasses, or other forms of grade separation distinguishes at-grade implementations. This often impacts traffic flow, particularly where at-grade intersections or crossings are present, potentially leading to congestion and safety concerns. The opposite of at-grade construction involves elevation changes that require significant excavation, fill, or structural supports.

At-grade meaning with examples

• The new bicycle path was designed to be 'at-grade,' minimizing construction costs by simply paving over the existing ground. This approach avoided the need for expensive bridges or tunnels, making the project budget-friendly. The result is a smooth, accessible path at the same level as the adjacent road.
• An 'at-grade' railway crossing was the subject of considerable debate due to potential safety hazards. Locals were concerned about the crossing's potential to disrupt traffic flow and the added risk of accidents.
• The city planners decided on an 'at-grade' road design for the expansion, ensuring the project would not require large cuts through the hillside.
• To improve pedestrian access, an 'at-grade' crosswalk was installed at the intersection, providing direct access across the road.
• After the flood, repairs included restoring the road 'at-grade', matching the original surface elevation.