The introduction of new measures including increased fines and compulsory ID for bike riders will not impact growth in cycling and will encourage more cyclists because they will feel safer sharing the roads, Transport for NSW says.

The complete opposite view is taken by cycle groups, which say the government has produced no evidence that the measures will make cycling safer or more popular.

Cyclists on Anzac Bridge. More cycling trips than ferry trips are made in Sydney every day. Credit:Michele Mossop

Walking and cycling in the city centre during the morning peak hour have more than doubled in the past decade from 5000 to 11,000 trips a day - but bicycle advocacy groups think that growth could be stifled by the new measures.

From March 1, the helmet penalty increases from $71 to $319 - a rise of 350 per cent - while the penalty for disobeying a red light rises from $71 to $425 (up 498 per cent).