What is the main use for 45-degree taxiway turnoffs at an airport?

The main use of 45-degree taxiway turnoffs at an airport is to increase capacity. These turnoffs allow aircraft to exit the runway at a sharper angle than standard exit angles. This design enables airplanes to vacate the runway more quickly after landing, thereby reducing the amount of time they occupy the runway.

By facilitating faster runway exits, 45-degree taxiway turnoffs contribute to an overall increase in the number of aircraft that can land and take off within a given time frame. This is particularly important at busy airports where maximizing runway utilization is crucial for maintaining operational efficiency. The quicker the aircraft can clear the runway, the sooner the next aircraft can land or take off, which ultimately leads to enhanced throughput and capacity on the airport's runway system.

While options such as improving fuel efficiency and enhancing runway length may be relevant in other contexts, they do not directly relate to the primary function of 45-degree taxiway turnoffs.