example, no jury for your speeding ticket in court

This is an entirely different issue. There are two main types of court systems in the United States: federal and state. The Seventh Amendment requires civil jury trials only in federal courts. This Amendment is unusual. The U.S. Supreme Court has required states to protect almost every other right in the Bill of Rights, such as the right to criminal jury trial, but the Court has not required states to hold civil jury trials. See Minneapolis & St. Louis Railroad Co. v. Bombolis (1916).

The United States is almost the only nation that continues to require civil jury trials. Civil juries similar to those in the United States are not part of the legal traditions of the Continent of Europe or the legal systems derived from those traditions, including in Latin America and Asia. Even in England and its former colonies of Canada, Australia, and New Zealand, civil jury trial has virtually been abolished.

In the state ratifying conventions for the federal Constitution, Anti-Federalists strongly protested the lack of a right to civil jury trial. They expressed concerns about debtors, and also argued that juries could protect litigants from bad laws passed by the legislature, tyrannical actions by the executive, and corrupt or biased judges. Fearing that a second constitutional convention might be called if a right to civil jury trial were not included in a federal Bill of Rights, James Madison drafted what became the Seventh Amendment.

Also, the term "common law" is being misused in many argument. Common law is simple: laws made by judges. Also known as case law.

In law, common law is the body of law created by judges and similar quasi-judicial tribunals by virtue of being stated in written opinions. The defining characteristic of “common law” is that it arises as precedent.

As common law varies by jurisdiction, it is not uniform over the United States. Much common law in Santa Rosa, CA is not going to be the same as in Houston, TX for example.