2. Ordinance on highway accesses

11.3 Auxiliary Lanes Where appropriate, the County Engineer may require additional traffic lanes to facilitate vehicular turning movements at existing or proposed highway access facilities. 11.3,1 Turn Lanes Turn lane installation will generally be calculated using Figure 11.2, as it presently exists or may hereafter be amended. Warrants are determined by plotting thru traffic volume and the turning traffic volume on Figure 11.2 for two-lane highways, Traffic volumes should be adjusted for the percentage of heavy vehicles. Divide each approach volume by the appropriate correction factor from Table 11.1 before plotting on Figure 11.2. Design year ADT is used to determine left-turn lane warrants, A left-turn lane provides a full-width lane for vehicle storage. If a left-turn lane is warranted on only one approach of the mainline at a four-way intersection, a left-turn lane should be provided on the opposite approach as well. Warrants for right-turn lanes are based upon present ADT and are divided into two categories - major and minor. A major right-turn lane provides a full-width lane for deceleration from the design speed on the mainline. A minor right-turn lane assumes vehicles will decelerate to 30 mph on the mainline before entering the auxiliary lane. 11,3.2 Design Turn lanes shall be constructed to the design and specifications of the County Engineer. 11.3.3 ADT The latest average daily traffic (ADT) for the road shall be utilized in the calculation, unless such figure is out of date or significant change to the road, traffic or area has occurred since the ADT was last collected, as determined by the County Engineer. Projected ADT's may be used if significant increases in traffic are anticipated by the County Engineer. 23 ...... "'I!IiIW...:.w11*.~~__''''''~