Shall Measure D, which would amend the County Charter to add sections: (1) prohibiting the Board of Supervisors from adopting a general plan allowing traffic congestion on Highway 50 west of Placerville to reach level of service F during peak-hour commute periods at build-out using a specified basis for determining traffic capacity, and (2) requiring the Board to postpone approving single-family residential subdivisions of 3 or more parcels until Highway 50 is widened to 8 lanes between Cameron Park and the Sacramento County line, be adopted?