What is the purpose of equipment restraint lines?

• A. Red lines delineate where we can and can't park unattended equipment.
• B. Blue lines show taxiway boundaries.
• C. White lines mark passenger walkways.
• D. Green lines indicate fueling zones.

Answer: (A)

Equipment restraint lines mark safe parking zones for ground support equipment when it’s not in use. The red lines show where unattended equipment may be left and where it must not be parked, helping keep the apron organized and ensuring there’s clear access for aircraft, pushback, and emergency responses. They also prevent gear from rolling into taxiways or into areas that must stay clear for safety.

Other colored lines have different meanings—blue lines indicate taxiway boundaries, white lines mark passenger walkways, and green lines designate fueling zones—so they’re not describing the purpose of equipment restraint lines.