Highway Engineering

Example 2.4 Contd

Destination Forecasted

total

Origin 1 2 3 4 origins

10300 750 225 3825

2 150 0 450 75 1675

3 300 300 0 450 2100

4 150 120 600 0 1375

Forecasted 700 1000 5500 1800

total

destinations

Table 2.6Matrix of

existing flows and

forecasted outbound

and inbound trip totals

Destination Existing Forecasted Origin

total total growth

Origin Z1 Z2 Z3 Z4 origins origins factor

Z1 0 300 750 225 1275 3825 3.00

Z2 150 0 450 75 675 1675 2.48

Z3 300 300 0 450 1050 2100 2.00

Z4 150 120 600 0 870 1375 1.58

Existing total 600 720 1800 750

destinations

Forecasted 700 1000 5500 1800

total destinations

Destination 1.17 1.39 3.06 2.4

growth factor

Table 2.7Calculation of origin and destination growth factors

Destination

Origin Z1 Z2 Z3 Z4

Z1 0 900 2250 675

Z2 372 0 1117 186

Z3 600 600 0 900

Z4 237 190 948 0

Amended 1209 1690 4315 1761

destination flows

Forecasted 700 1000 5500 1800

destination flows

Destination 0.58 0.59 1.27 1.02

growth factor

Table 2.8Production of

first amended matrix

and revision of

destination growth

factors

Contd

Destination Amended Forecasted

outbound outbound Growth

Origin Z1 Z2 Z3 Z4 flows flows factor

Z1 0 533 2868 690 4091 3825 0.94

Z2 215 0 1423 190 1828 1675 0.92

Z3 347 355 0 920 1622 2100 1.29

Z4 137 112 1209 0 1458 1375 0.94

Table 2.9Production of second revised matrix and revision of origin growth factors