 The rules are scheduled to go into effect in September 2014.In April 2014 the European Parliament approved legislation that requires the mandatory use of Acoustic Vehicle Alerting Systems (AVAS) for all new electric and hybrid electric vehicles, and car manufacturers have to comply within 5 years.As of mid-2010, and in advance of upcoming legislation, some carmakers announced their decision to address this safety issue shared by regular hybrids and all types of plug-in electric vehicles, and as a result, the Nissan Leaf and Chevrolet Volt, both launched in late 2010, and the Nissan Fuga hybrid and the Fisker Karma plug-in hybrid, both launched in 2011, include synthesized sounds to alert pedestrians, the blind and others to their presence.