9-1. Traffic volumes on a four-lane freeway (two lanes in each direction) were counted manually from an overhead location, resulting in the data shown below. The desire was to obtain continu- ous 15-minute counts for each lane of the freeway for a two-hour period surrounding the morning peak hour. Data for Problem 1 Eastbound Westbound Time of Count (PM) Lane 1 Lane 2 Lane 1 Lane 2 4:00-4:12 360 310 4:15-4:27 350 285 4:30-4:42 380 330 4:45-4:57 370 300 5:00-5:12 370 340 5:15-5:27 345 280 5:30-5:42 340 310 5:45-5:57 320 260 From the data shown, determine the following: (a) Continuous 15-minute volumes for each peri- od and each lane. (b) The peak-hour, peak-hour volume, and PHF for each direction of flow, and for the freeway as a whole. (c) Directional flow rates during each 15-minute count period.