Just as the HSR prepares to gear up for the big increase in passenger volumes with back-to-school next week it appears a number of HSR’s buses will be out of commission. The result will be lower frequency on some routes. An internal HSR memo blames “delays in purchase order processing,” for a shortage of repair parts that will idle a number of the HSRs buses. The memo states, “all affected routes will continue to operate, but customers may expe…