पहाड़ी सड़कों के निर्माण और रखरखाव के दौरान आने वाली निम्नलिखित में से कौन सी एक अत्यधिक सामान्य भू-तकनीकी समस्या (geotechnical problem) है?

The paved area adjacent to and in front of the terminal building is known as the apron, used for loading and unloading aircrafts. The dimensions of the loading apron depend upon: Statement 1: Number of loading positions required Statement 2: Size of the airport and service station for aircrafts

The thickness of the sub-base layer should NOT be less than ____ for a design traffic of less than 10 MSA as per IRC guidelines.