b$.$ Now assume you are on the same stretch of rural freeway, but it was designed with a sight distance of only $450$ feet from the location were a driver notices an obstruction in the road. Estimate the vehicle$$s collision speed $($i$.$e$.,$ speed after the driver decelerates$),$ assuming the AASHTO standard values for a reaction time of $2\mathrm{.}5$ seconds and deceleration rate of $11\mathrm{.}2$ fpss$.(2$ points$)$