&gt; everyone talks about legibility etc but nobody points to any study (or even pictures) on how those fonts compare under low conditions (night, rain, not illuminated, headlight full on)<p>That doesnn&#x27;t seem to be quite true:<p>&gt; In 2004, the agency embraced Clearview, based on studies that appeared to demonstrate its superiority, especially in nighttime driving tests.<p>Granted, <i>mentioning</i> studies generally is different to pointing to <i>specific</i> studies, but still it seems clear that exactly the issues you raise are of concern.