61.05 TRAFFIC LANES.

Where traffic lanes have been marked on street pavements at such places as traffic conditions require, it is unlawful for the operator of any vehicle to fail or refuse to keep such vehicle within the boundaries of any such lane except when lawfully passing another vehicle or preparatory to making a lawful turning movement.

(Code of Iowa, Sec. 372.13[4] & 321.255)

61.06 NECESSITY OF SIGNS.

No provision of this Traffic Code for which signs are required shall be enforced against an alleged violator if, at the time and place of the alleged violation, an official sign is not in a viewable position and sufficiently legible to an ordinarily observant person.

61.07 STANDARDS.

Traffic control devices shall comply with standards established by The Manual of Uniform Traffic Control Devices for Streets and Highways.

(Code of Iowa, Sec. 321.255)

61.08 JURISDICTION.

The Police Department shall have jurisdiction over all traffic control devices.

61.09 TEMPORARY DEVICES.

The Police Chief is hereby authorized to place temporary traffic control devices for the duration of an emergency, specific event or temporary condition as traffic conditions may require to regulate, guide or warn traffic and to block off streets without prior Council approval.