State highway transportation officials, apparently smarting from the resounding defeat of Proposition B, have cancelled plans for long-term highway projects throughout the state. Letters have been sent to contractors cancelling plans for preliminary construction work. Public hearings scheduled to discuss long-planned projects have been cancelled. Officials had said before the vote that if it was defeated, the projects would still be completed, just at a slower pace. More than 70-percent of Missouri voters rejected the proposed increase in the sales and gas tax that would have generated nearly $500-Million a year more for transportation needs in the state.