Please answer the questions Thank you so much Vehicle Speeds

Vehicle Speeds (mph) 11. Find 85th percentile speed a. From Cumulative Frequency Distribution Curve 12. Find median speed b. From Cumulative Frequency Distribution Curve 13. Find the modal speed c. From Histogram i. ii. Mode= Most frequently occurring speed Problem 2: A traffic engineer needs to determine the AADT on a rural primary road that has the volume distribution characteristics shown in the previous tables. The following volume data were collected on a Wednesday during April. Determine the AADT of the road. Given: Wednesday in April 1:00-2:00 pm 600 veh 2:00-3:00 pm 330 veh 3:00-4:00 pm 456 veh 4:00-5:00 pm 787 veh Find: AADT

Solution

Soln 2) provide table also-

ADT = Total number of vehicle in a month or week / 30 or 7

= 75,122 / 7

= 10732 veh/day

AADT = Total number of vehicles in 365 days / 3365

Soln 3) PHV = 200 + 900 + 600 + 300

= 2000 veh

V15 - 15 minute maximum traffic volume of that hour

V15 = 900 veh

Here asked (PHF)15

PHF = 2000 / (4*900)

= 0.55

DHV = PHV / PHF

= 2000 / 0.55

= 3600 veh/hr