In a study for Trafikverket, the Swedish Transport Administration, WSP has developed a concept of mobile maintenance where work is performed by mobile road units maintaining rail vehicles where and when needed along the main line.
This is done by deploying specialized mobile road units ranging from small cars for light maintenance to large trucks and cranes for major repairs immediately after, or even before, a fault is detected. The mobile unit can quickly arrive on site of the damaged vehicle, from a strategic location covering a large area, to perform almost any kind of maintenance without unloading cargo or hauling.
Discussions held with the most prominent maintainers in Sweden came to the conclusion that both maintenance and repairs, such as routine audits, weld repairs, brake pad replacements, and even heavy repairs such as wheel axle replacements are suitable for mobile maintenance.
Suitable locations for mobile maintenance on the public rail network in Sweden: