(a) 
Except as otherwise provided in this section, no person may drive, operate or move, nor may any owner permit to be driven, operated or moved, any vehicle having a gross weight exceeding 25,000 pounds upon any street, alleyway or public thoroughfare in the city.
(b) 
This section shall not apply to the following, each of which is excepted from the prohibitions:
(1) 
School buses;
(2) 
Any truck, bus or trailer utilized for the purpose of the actual loading or unloading of goods, wares and merchandise when the vehicle is accompanied by its driver; provided further, loading or unloading shall be limited to a reasonable time to complete the operation;
(3) 
Oilfield vehicles servicing a well within the limits of the city; and
(4) 
The streets and thoroughfares designated by the city as truck routes shall be excepted from the above prohibitions.
(2002 Code, sec. 71.01)
(a) 
It shall hereafter be unlawful for any person to drive or operate a motor vehicle upon any street, roadway or highway in the city at a speed greater than is reasonable and prudent under the conditions then existing, having regard to the actual and potential hazards when approaching and crossing an intersection or a railway grade crossing, when approaching and going around a curve, when approaching a hill crest, when traveling upon any narrow or winding roadway, or when special hazard exists with respect to pedestrians or other traffic or by reason of weather or highway conditions.
(b) 
In every event, speed shall be so controlled as may be necessary to avoid colliding with any person, vehicle or other conveyance on or entering the highway in compliance with legal requirements and the duty of all persons to use due care.
(2002 Code, sec. 71.02)