SYDNEY'S cycleways will save the city millions of dollars in travel time, pollution and fatalities over the next 30 years, a new report suggests.

Economists put a dollar value on factors surrounding the cycleways: Human life ($165,659 per year), health ($487 per year), and sitting in gridlock ($12.20 per hour). By crunching the numbers, top global economists AECOM found that over 30 years the paths would save Sydney $507 million - or 84c per kilometre.