What is the typical altitude limit of controlled airspace?

The typical altitude limit of controlled airspace generally extends above 10,000 feet. Controlled airspace is designed to ensure safe and organized flight operations, accommodating both commercial and general aviation traffic.

In many regions, controlled airspace begins at lower altitudes but often includes higher altitude layers that reach up to 18,000 feet, where it transitions to Class A airspace. Class A airspace specifically is designated for aircraft operating at altitudes from 18,000 feet up to 60,000 feet, which is primarily used by commercial flights. Therefore, stating that the altitude limit is "above 10,000 feet" aligns with the defined characteristics of controlled airspace.

The other options do not represent the remit of controlled airspace accurately based on established aviation regulations.