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A northbound two-lane (one direction) segment of freeway currently has a measured density of 32.0 pc/mi/ln...

A northbound two-lane (one direction) segment of freeway currently has a measured density of 32.0 pc/mi/ln and a measured FFS of 65 mi/h. The peak-hour factor is 0.95, the traffic stream contains 7% single-unit trucks and 3% tractor-trailer trucks. The freeway segment is on a 3.5% upgrade that is ¾ of a mile long. With the peak-hour factor unchanged, how many trucks (assuming the same ST/TT split) can be added to the peak hour before capacity is reached?

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