What does 'equipment' refer to in railway terminology?

In railway terminology, the term 'equipment' encompasses a broad range of vehicles and tools used in the operation and maintenance of rail services. This includes railroad cars, which are the vehicles that transport passengers and freight, as well as engines, which provide the power to move these cars. Additionally, track cars, which are utilized for maintenance and inspections of the railway infrastructure, are also considered part of the category of equipment.

This comprehensive definition of 'equipment' reflects the diverse components that are integral to the functioning of rail systems. Understanding that equipment is not limited to just passenger cars, switching systems, or signaling devices highlights the importance of all these elements working together to ensure operational efficiency and safety. Thus, the correct answer is indeed the one that encompasses the full range of rail vehicles and maintenance apparatus.