Using AASHTO method, design storage length for a left turn lane for an intersection where opposing traffic volume is $1000$ vehicles per hour. It is expected the left turn lane would receive $280$ vehicles per hour, of that $10\%$ is truck traffic. Your design should satisfy $99\mathrm{.}5$ percent of the lane capacity. Use critical gap time of $6\mathrm{.}25$ seconds with follow$-$up gap time of $2\mathrm{.}2$ seconds. Use an average length of $25$ feet per vehicle for your design.