| - Set sequence of the input trains in set (ht) (including selected non-stop direct trains |
| (e.g., short-distance trains with running sections covering high passenger density) in set |
| (gt)) |
|
repeat |
|
for train ( to ( (ht))) do |
| - Enumerate all passenger OD pairs that can be covered |
| - Calculate the maximum remaining stop times that can be added on train |
| in set (ht), notated as |
| Repeat |
| for () do |
| - Enumerate all station group(s) with combined station(s) of the |
| third classification ((tc)), notated as (sg, ), where is index symbol |
| - Calculate total passenger traffic of all combined passenger OD pairs |
| among station(s) in (sg, ) together with existing stop(s) and OD on train |
| , notated as TP((sg, )) , where both and or at least |
| one of them belong to (sg, ) |
| - Select the group (sg, ) with the maximum TP((sg, )) |
| if train has a cost-efficient frequency to be operated with assigned |
| TP((sg, )) on it, do |
| - Add station(s) in the selected group on train as additional stop(s), |
| and update passenger flow, go to Step 7 |
| else do |
| - Update , go to Step 7 |
| end for |
| until |
| end for |
|
until assigning the remaining passengers on trains is completed, then set of (lt) |
| is obtained |
| |
|
*From the perspective of the rail operator, a cost-efficient train operating frequency is defined as |
| at least one train per day for a given train OD with a rational loading factor (e.g., ≥0.70). |
