§ 75.03 – What sample average should I use for rail services?

(a)    The unit of sampling and measurement you have chosen for your sampling plan determines the sample average you should use. 

(b)   While you could have chosen any unit of sampling measurement for your sampling plan, it most likely is one of the following:

(1)   One-way car trips.

(2)   One-way train trips.

(3)   Round-trip car trips.

(4)   Round-trip train trips.

(c)    Assuming that your unit of sampling and measurement is in one-way car trips, Table 75.01 shows the sample averages you should use.

(d)   If your sample happens not to include any one-way car trips for a particular weekday time period, use UPT per one-way car trip for weekdays to estimate the annual total UPT for this weekday time period. 

Table 75.01.  Sample Averages for Rail Services

If the service-consumed measure is

and if the measure is

and if your sampling plan is

and if your mode is

then you should calculate the following sample average

UPT

for annual total

not based on grouping

 

UPT/one-way car trip

based on grouping

 

UPT/one-way car trip by group

for daily average

 

 

UPT/one-way car trip by type of service days

by weekday time period

 

commuter rail (CR), heavy rail (HR), or light rail (LR)

UPT/one-way car trip by weekday time period

PMT

for annual total

not based on grouping

 

PMT/one-way car trip

based on grouping

 

PMT/one-way car trip by group

for daily average

 

 

PMT/one-way car trip by type of service days