(5) Using the formula. Now that you have values for all of the

unknowns, substitute them in the formula for CTL, as illustrated in

subparagraph 2.11f, and make the necessary computations.

d. Net trainload. The fourth step is to find the net trainload

(NTL) as explained in paragraph 2.12. Since NTL is 50 percent of

GTL, the NTL for this division is 419 short tons.

837 x .50 = 418+, or 419 short tons

e. Train density. Now, for the fifth step, determine what the

train density (TD) is for the division. Using the formula presented

in paragraph 2.13b and the information in paragraph 2.17a, you have

values for all of the unknowns except average speed (S). Since the

track is rated good to fair and the percent of ruling grade is 1.5,

table IV shows that an average speed of 10 mph should be used.

Substitute this value in the formula and make your computations for

TD as follows:

f. Net division tonnage. Now that you know the NTL and the TD

for this division, the final step is to find the net division tonnage

(NDT) by multiplying the two values NTL x TD:

419 x 15 = 6,285 STON

If you do not run any passenger trains over this division, you can

move 6,285 short tons over it.