The winter of 2009-2010 was characterised by a prolonged presence of snow on public roads and bike paths. This was a major degree of nuisance to cyclists. An estimated 8,300 cyclists were injured due to a fall by iciness. The ice caused some 10% of the overall 2010 number of cycling accidents in a mere two months. Many more cyclists have fallen but with minor injuries or material damage only. In addition many cyclists have been forced to adapt their behaviour or mode of transportation. The essential issue in this study is how road maintenance authorities may improve de-icing on bicycle provisions. That question is answered by means of the results of an internet questionnaire (1,035 respondents) and the complaints registered at the digital complaints desk of Fietsersbond. This focuses on de-icing main bicycle routes (bike paths and bicycle lanes). The emphasis should be on de-icing these in view of the large numbers of cyclists and their greater vulnerability in icy conditions (CROW 270, 2008). The questionnaires reveal that many road maintenance authorities fail impressively at de-icing main bicycle routes. Only a third of towns manages to realise de-icing on the majority of their bicycle network routes. Large towns and those in the west of the Netherlands perform even worse. Remarkably, road maintenance authorities that tackle de-icing at but a few locations, do so also much later than authorities tackling icy conditions more widely. The main reason is therefore lack of attention and prioritising. The icy conditions were caused almost exclusively by snow in the winter of 2009-2010. Snow can barely be removed by use of salt, certainly not on bike paths. Therefore the emphasis should be on brushing or sweeping away snow (CROW 270, 2008), preferably as soon as possible in order to prevent snow turning into ice as a result of traffic passage. Yet almost two-fifths of road maintenance authorities has fought snow on bike paths by salting exclusively. There appears to be a clear gap in knowledge among road maintenance authorities. The evaluation of this winter leads to the following recommendations: - recognise the large risks to cyclists of insufficient de-icing on main bicycle routes - award de-icing main bicycle routes the highest priority and implement this in principle within 3.5 hours according to the current CROW standard - fight snow on bike paths by sweeping or brushing, not salting - prevent bad infrastructure on bicycle routes, since this causes additional problems in de-icing - prepare a plan of approach for de-icing as early as summer, including a materials check - publish the de-icing routes, for instance on the internet.