Final answer:
A traffic violator can be released on their promise to appear by signing a written promise to show up in court or pay the fine, commonly known as being released on own recognizance.
Step-by-step explanation:
An arrested traffic violator may be released on his promise to appear if the violator provides a written promise, signed in the presence of the arresting officer, to appear in court or pay the fine as required. This procedure, often referred to as being released on one's "own recognizance," means that the violator is not required to pay bail to secure release after an arrest for a traffic violation. The decision to release a violator on a promise to appear is typically at the discretion of the arresting officer or pursuant to local laws and regulations.