Traffic signs and pavement markings:

Traffic flow is controlled by pavement markings, traffic islands, signals, and signs. These devices inform drivers of conditions on the roadway and help guide drivers safely to their destinations. You must always obey traffic signs, signals, and pavement markings.

• Must always be obeyed.
• Are merely suggestions.
• Must be followed only when there is other traffic.
• Must be followed only when a police officer is present.