Sentence:  A “moving platform” scheme...is more technologically ambitious than maglev trains even though it relies on conventional rails. Local trains would use side-by-side rails to roll alongside intercity trains and allow passengers to switch trains by stepping through docking bays. This set-up <WSD>solves</WSD> several problems [...]. 
Meaning of the word marked with <WSD> tags:  To find an answer or solution to a problem or question; to work out.