The weekly cap on Opal cards will be cut to $50 a week in an election pledge made by the Berejiklian government.

Currently those using an adult Opal card on trains, buses, ferries and light rail within the Opal network pay no more than $63.20 a week for their commuting.

The Coalition has pledged to cut the cap on weekly Opal fares from $63.20 to $50. Credit:Peter Rae

But in advertisements broadcast over the weekend, the Coalition announced that, if it is re-elected, the cap would be slashed by 20 per cent to $50.

Without the cap at all, a passenger travelling between Penrith and Town Hall during peak times from Monday to Friday would otherwise pay nearly $68.