Complex sentence: In early 2011, ticket barriers were installed at,, Broxbourne, Cheshunt and Hackney Downs, some of the busiest stations on the line, toreduce the need for ticket inspectors on the Stansted Express service and reduce fare evasion.
Split into simpler sentences: In early 2011, ticket barriers were installed at,, Broxbourne, Cheshunt and Hackney Downs, some of the busiest stations on the line. This was done to reduce the need for ticket inspectors on the Stansted Express service and reduce fare evasion.