Research Projects

Intersecting Runways - Best Practices for Grade Design

FAA design guidance regarding grade issues for intersecting runways leaves a fair amount of discretion to the design engineer. This topic will seek to provide additional guidance regarding gradient requirements and best practices.

Background (Describe the current situation or problem in the industry, and how your idea would address it.)

FAA design guidance in FAA Advisory Circular 150/5300-13A, Airport Design for intersecting runways , leaves a fair amount of discretion to the design engineer for grade issues. This topic will seek to provide additional guidance regarding gradient requirements and best practices. FAA design guidance recommends that surface gradient requirements for the primary or higher category runway take precedence over the lower category runway, what is an appropriate amount of maximum longitudinal grade changes that can be safety accommodated? FAA design guidance allows transverse grades to be adjusted to avoid excessive runway roughness as long as adequate drainage is provided, but does not provide any guidance regarding maximum or minimums that are acceptable.

Objective (What is the desired product or result that will help the airport industry?)

FAA design guidance regarding grade issues for intersecting runways leaves a fair amount of discretion to the design engineer. This topic will seek to provide additional guidance regarding gradient requirements and best practices.

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Idea No. 31