In this case, being a "traffic engineer" with the ability to sign engineering plans means graduating from an ABET-accredited engineering program, passing both the Fundamentals of Engineering exam and the Principles & Practice of Engineering exam, being licensed as a professional engineer, and passing the Professional Traffic Operations Engineer exam. I think they do a little more than "maximize vehicular traffic flow."

> I think they do a little more than "maximize vehicular traffic flow."

You would be mistaken. Traffic engineers are responsible for far, far more deaths than software engineers.