§ 67.07 – How should I process the entered data?

(a)    You should process the data as follows immediately after you have entered them.  If your service unit has more than one one-way vehicle trip, you should process the data for individual one-way 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 between-stop 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 between-stop 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