In the last years, bicycles became very popular in Israel and in Jerusalem in particular (especially electric bikes because Jerusalem is very hilly) and they have been adopted as a cheap means of transportation.
The Ministry of Transportation issued numerous laws regarding driving bikes (helmets, traffic laws, etc.), but many otherwise observant Jews (adults AND kids) allow themselves to openly bypass traffic laws, such as crossing a red light before other drivers.
Imagine a central junction where tens of cars stand still and a visibly observant Jew crosses on the red light.
How serious is such a transgression and what Rabbis speak specifically about observing traffic laws even in Israel?