(a) You should process the data as follows immediately after you have entered them. If your service unit has more than one oneway vehicle trip, you should process the data for individual oneway vehicle trips:
(1) Sum the number of passengers boarded at individual stops in column (10) of Table 67.01 to get the total number of passengers boarded (UPT). It is 24 in this case.
(2) Sum the number of passengers alighted at individual stops in column (11) of Table 67.01 to get the total number of passengers alighted. It is 24 in this case.
(3) Calculate the load between every pair of two consecutive stops. Table 67.03 shows an example and the formulas for calculating leaving loads and arriving loads.
(4) Calculate PMT for each pair of consecutive stops by multiplying the calculated load with the betweenstop distance. Table 67.03 also shows the calculation of PMT with both leaving loads and arriving loads.
(5) Calculate total PMT. It is 47.8 miles in this case.
(6) Divide total PMT by the total number of passengers boarded to get APTL. It is 1.99 miles in this case.
(7) Calculate vehicle trip length by summing up the predetermined betweenstop distances in column (9). It is 4.0 miles in this case.
(b) If your sampling plan is based on the PPMT option, you should also process the data as follows immediately to calculate the ratio of PMT to PPMT for each service unit:
(1) Calculate the average route length for each route.
(2) Calculate PPMT by multiplying UPT by average route length.
(3) Divide PMT by PPMT to get the ratio for each service unit.
(4) Follow Subsection 85 on calculating average route length and PPMT.
Table 67.03. Calculation of Loads and PMT
Load Type 
Stop Sequence 
Distance to Next Stop 
No. of Pass. Boarded 
No. of Pass. Alighted 
No. of Pass. from Previous Trip 
Calculated Load 
PMT 
Leaving Load 
1 
0.3 
20 
0 
2 
20 
6.0 
2 
0.7 
2 
1 

21 
14.7 

3 
0.6 
0 
2 

19 
11.4 

4 
0.3 
1 
3 

17 
5.1 

5 
0.5 
1 
10 

8 
4.0 

6 
0.8 
0 
2 

6 
4.8 

7 
0.2 
0 
1 

5 
1.0 

8 
0.1 
0 
2 

3 
0.3 

9 
0.1 
0 
2 

1 
0.1 

10 
0.3 
0 
0 

1 
0.3 

11 
0.1 
0 
0 

1 
0.1 

12 
0.0 
0 
1 

0 
0.0 

Total 
4.0 
24 
24 
2 
N/A 
47.8 

Load for Stop 1 = 
Current Boarding 


Load for Other Stops = 
Previous Load + Current Boarding – Current Alighting 

Arriving Load 
Stop Sequence 
Distance from Previous Stop 
No. of Pass. Boarded 
No. of Pass. Alighted 
No. of Pass. from Previous Trip 
Calculated Load 
PMT 
1 
0.0 
20 
0 
2 
0 
0.0 

2 
0.3 
2 
1 

20 
6.0 

3 
0.7 
0 
2 

21 
14.7 

4 
0.6 
1 
3 

19 
11.4 

5 
0.3 
1 
10 

17 
5.1 

6 
0.5 
0 
2 

8 
4.0 

7 
0.8 
0 
1 

6 
4.8 

8 
0.2 
0 
2 

5 
1.0 

9 
0.1 
0 
2 

3 
0.3 

10 
0.1 
0 
0 

1 
0.1 

11 
0.3 
0 
0 

1 
0.3 

12 
0.1 
0 
1 

1 
0.1 

Total 
4.0 
24 
24 
2 
N/A 
47.8 

Load for Stop 1 = 
0 





Load for Other Stops = 
Previous Load + Previous Boarding – Previous Alighting 