Did Seattle's mandatory helmet law kill off its bike-share scheme?

Seattle has become the first major US city to shut a public bike share scheme. Was it the helmet law " or the lack of cycle lanes and the notorious hills and rain?

A small group of supporters, journalists and a city councilman gathered at the end of last month to take Seattle's cycle share bikes out for one last spin. Mayor Ed Murray had pulled the plug on the Pronto system after two-and-a-half years of low ridership, financial troubles and waning political support.

Sitting tall on the clunky, lime green bikes, our group of 10 pedalled through downtown's heavy evening rush hour traffic, picking up a few more mourners on Pronto bikes en route.