Sydney drivers are spending almost four days a year stuck in traffic on the city's clogged roads.

A study undertaken by GPS firm TomTom has revealed that Sydney is the most congested city in Australia and New Zealand.

Tuesday and Wednesday morning were found to be the worst time on the city's roads. Credit:Dean Sewell

For those stuck in bumper to bumper traffic on Wednesday morning it will come as little comfort that their frustration is justified.

Tuesday and Wednesday morning were found to be the worst time on the city's roads.