(a) Suppose that:
(1) Your unit of sampling and measurement is oneway bus trips, and
(2) You are going to estimate annual total PMT.
(b) You should do the following for each route:
(1) Determine the annual number of vehicle revenue miles for the report year.
(2) Determine the annual number of vehicle revenue oneway trips for the report year.
(3) Divide the annual number of vehicle revenue miles by the annual number of vehicle revenue oneway trips to get the average route length.
(4) Multiply your routelevel 100% counts of UPT with the calculated average route length to get routelevel PPMT.
(c) You should sum the calculated routelevel PPMT across all routes to get your annual PPMT for all routes.
(d) Table 85.01 illustrates how you may accomplish (b) and (c).
Table 85.01. Calculating Annual Total PPMT for All Operating Routes
Route Number 
Route Name 
Annual Revenue Trips 
Annual Revenue Miles 
Average Route Length 
100% UPT 
100% PPMT 
90 
Blue Line 
3,869 
9,975 
2.58 
22,866 
58,952 
50 
Red Line 
3,286 
10,310 
3.14 
23,634 
74,148 
14 
Prospect 
1,643 
10,690 
6.51 
24,506 
159,446 
12 
Beechcrest 
1,643 
11,835 
7.20 
27,131 
195,435 
17 
College 
3,286 
30,666 
9.33 
70,298 
656,036 
37 
Park 100 
1,325 
22,733 
17.16 
52,112 
894,068 
8 
Washington 
3,392 
61,077 
18.01 
140,012 
2,521,072 
19 
Castleton 
1,696 
32,916 
19.41 
75,457 
1,464,491 
26 
Keystone 
1,378 
28,505 
20.69 
65,344 
1,351,666 
10 
10th St. 
3,339 
69,897 
20.93 
160,231 
3,354,198 
Total 
10,729,514 
(e) If your sampling plan is based on service grouping, you must also determine PPMT for each group. Suppose, for example, that you have grouped your short routes into one group and your longer routes into another. Table 85.03 illustrates how you may use routelevel information on annual revenue miles, annual revenue trips, and annual UPT to determine PPMT for each group.
Table 85.03. Calculating Annual Total PPMT by Route Group
Route Group 
Route Number 
Annual Revenue Trips 
Annual Revenue Miles 
Average Route Length 
100% UPT 
100% PPMT 
Short Routes 
90 
3,869 
9,975 
2.58 
22,866 
58,952 
50 
3,286 
10,310 
3.14 
23,634 
74,148 

14 
1,643 
10,690 
6.51 
24,506 
159,446 

12 
1,643 
11,835 
7.20 
27,131 
195,435 

17 
3,286 
30,666 
9.33 
70,298 
656,036 

Total 
1,144,018 

Long Routes 
37 
1,325 
22,733 
17.16 
52,112 
894,068 
8 
3,392 
61,077 
18.01 
140,012 
2,521,072 

19 
1,696 
32,916 
19.41 
75,457 
1,464,491 

26 
1,378 
28,505 
20.69 
65,344 
1,351,666 

10 
3,339 
69,897 
20.93 
160,231 
3,354,198 

Total 
9,585,496 