Heathrow's proposed third runway faces challenges due to the nearby M25 motorway, leading to a new plan to build a ramp over the road instead of a tunnel. This approach, deemed cheaper and quicker by Transport Secretary Chris Grayling, would have a minimal gradient of less than 1% and would not impact aircraft performance during takeoff or landing. Experts clarify that such gradients are commonly found in other UK airports, and that the ramp wouldn't be visible to passengers. This solution aims to address the logistical and safety concerns involved in airport expansion.
The gradient of the ramp proposed for Heathrow's third runway would be less than 1%, which does not affect the performance of an aircraft during takeoff or landing.
Transport Secretary Chris Grayling highlighted that constructing a ramp instead of a tunnel beneath the runway would be a cheaper and faster solution, while addressing concerns over the busy M25.
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