Does dina demalchusa dina apply to all government laws, such as traffic laws? In other words, if someone drives over the speed limit or crosses the street (when no cars are coming) at a red light is he violating halacha (the halacha of dina demalchusa dina)?
Dina Dmalchusa Dina applies by laws made by the government for public safety, including traffic laws, etc. red light, speeding, jay walking, etc. as long as these laws are enforced by the government. For example if the government does not enforce driving over the speed limit when it is only a few miles over then that would be permitted, however to the degree that one would get a ticket, then it would apply.
R’ Yisroel Belski Zt”l, R’ Y. Cahen shlit”a. psachLi8158