At the recent 59th meeting of the Groupe des Rapporteurs d’Éclairage, GRE, the French delegation proposed a reduction in the inboard angles at which vehicles’ front and rear light-signalling devices must be visible. France proposed to reduce these angles from 45° to 20° at all test points below horizontal. The change would make it easier to produce signal lamps, that harmonise with the steep rake angles demanded by aerodynamicsvehicle’s ligh.
Other delegations such as that of the UK, as well as the Canadian regulator expressed concerns for the safety implications of such a move, which would also negate a hard-won point of harmonisation with the USA. The US recently amended its lighting rules to require 45° inboard visibility for vehicle signalling functions; the previous US requirement had been 15°.