Well, considering the extent of federal and state law as well as numerous local codes it has been put forth that practically speaking we are all breaking the law at some point.
However, in regards to certain traffic laws, I obey them because I've already been to jail before. I have absolutely no desire to even put up with another confrontation with police over a malfunctioning taillight even less so for speeding or something along those lines.
But as the the "moral" laws such as stealing, assault, rape and murder I do not violate those laws because within myself I do not want to do such things. This is absent any religion or tradition.
It's also better to remember that the law is not preventative in nature. It is punitive.