Example 5.1 The speeds of five vehicles were measured (with radar) at the midpoint of a 0.8 km section of roadway. The speeds for vehicles 1, 2, 3, 4, and 5 were 71, 68, 82, 79, and 74 km/h, respectively. a) Calculate time-mean speed b) Calculate space mean speed (Assuming all vehicles were traveling at constant speed over the roadway segment) Solution: a) Time-mean seed: ūt = Σιμι == n 71+68+82+19+84 5 = 76.80 km/h