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 would also let high-speed trains <WSD>skirt</WSD> cities as moving platforms ferry passengers to and from the city centre. 
Meaning of the word marked with <WSD> tags:  To move around or along the border of; to avoid the center of.