Sentence:  A six-day <WSD>blockade</WSD> from 28 May to 2 June saw NR <small>[National Rail]</small> straighten the track through the station, facilitating a linespeed increase from 60mph to 85mph over a 4km stretch. 
Meaning of the word marked with <WSD> tags:  The physical blocking or surrounding of a place, especially a port, in order to prevent commerce and traffic in or out.