The Transport Management Centre reported at 1pm that eastbound traffic was heavy from Mount Victoria to Blackheath on the Great Western Highway, adding at least 30 minutes of travel time.

Acting Prime Minister Michael McCormack and Minister for Decentralisation and Bathurst's federal member Andrew Gee were at Little Hartley earlier in the day to inspect part of the site of the multi-billion dollar Great Western Highway duplication project.

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The highway is due to be duplicated from Katoomba to Lithgow over a number of years.

The delays were dramatic over the Blue Mountains during Easter, when the annual exodus over the Blue Mountains was complicated by the closure of a large section of Bells Line of Road due to landslides around Mount Tomah.

Mr Gee said it took his daughters more than nine hours to get to Orange from Sydney over the Easter holidays.

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