Transportation Engineering

Question 1

Time Mean Speed Formula

Answer 1

TMS = ∑V / N

Question 2

Space Mean Speed Formula

Answer 2

TMS = n / (∑1/ V)

Question 3

Traffic Flow Formula

Answer 3

q = N/t
q= kv

Where:
q= number of vehicles
t= total time of observation
k= traffic density

Question 4

Ability of a roadway to accommodate traffic volume

Answer 4

Traffic Capacity

Question 5

The difference in position of vehicles arriving in a certain point

Answer 5

Space Headway

Question 6

Space headway formula

Answer 6

Hs = 1 / k

Question 7

The difference in time of vehicles arriving in a certain point

Answer 7

Time Headway

Question 8

Time headway formula

Answer 8

Ht = 1 / q

Question 9

The clear distance between 2 consecutive vehicles

Answer 9

Clearance

Question 10

Time between two consecutive vehicles

Answer 10

gap

Question 11

Speed Density Relationship Formula

Answer 11

V = Vf (1-k/kj)

Question 12

Flow Density Relationship Formula

Answer 12

q = Vf/kj x k² + kVf

Question 13

K optimum Formula

Answer 13

Kopt = kj / 2

Question 14

Flow Speed Relationship Formula

Answer 14

q = kj/Vj x V² + Vkj

Question 15

V opt Formula

Answer 15

V opt = Vf / 2

Question 16

Max Flow Capacity Formula

Answer 16

q max = k opt / v opt

Question 17

Traffic Max Capacity Formula

Answer 17

Vf Kj / 2

Question 18

The standard system used to describe the queuing model

Answer 18

Kendall’s Notation

Question 19

Traffic Intensity Formula

Answer 19

ρ = λ / μ

Question 20

M|D|1: Average Length of queue

Answer 20

ǭ = ρ² / 2(1-ρ)

Question 21

M|D|1: Average waiting time in queue

Answer 21

ω = ρ² / 2μ(1-ρ)

Question 22

M|D|1: Average time spent in the system

Answer 22

t = 2-ρ / 2μ(1-ρ)