Agenda Packets - 1989/06/19 - Laserfiche WebLink

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but I do not believe it would be as convenient for them. The roadway will be crowned between the 2 traffic lanes, therefore the decision regarding the parking lane should be decided before construction and not changed at a later Gate. The minimum pavement design is for nine ton axle loading. This is necessary to accommodate garbage trucks, moving vans, busses, and other heavily loaded traffic which will serve the neighborhood. The actual design procadure considers the effects of axle loading over a 20 year design period and refers to this as the summation of equivalent 18,000 pound loads. The range of equivalent axle loads varies from 0.0004 equivalent for a passenger car. to 4.10 for au overloaded truck. The design procedure provides the necessary structure to support the legally loaded vehicles using the street, the estimated traffic over the design period, and a factor of safety for some overloads or extended service life. Garbage trucks as well as moving vans can exceed the legal weight limits at times, therefore this approach assures adequate pavement structure for the life of the street. Although we are only required to f.,llow this approach on state aid streets, I recommend following this design approach on all street construction or reconstruction projects. This was not done in the past and some City streets are restricted during the spring thaw to lesser axle limits. This requires garbage trucks to only partially load, limits deliveries of construction materials to new homes or remodeling projects, and can cause problems for bus routes. While some of these activities are exempted from the weight limits, the road deteriorates much more rapidly when the limits are exceeded.