* Bangkok - Chiang Mai: 751 km

Car kilometers = (6 cars × 3 train services - 3 cars×2 train services) ×

751×2×365 ≒ 6,579

(1,000 car kilometers/year)

Operating expense = 6,579×11.28 ≒ 74 (million bahts/year)

* Bangkok - Phitsanulok: 389 km

Car kilometers = (6 cars×3 train services - 3 cars×3 train services) ×

389×2×365 ≒ 2,556

(1,000 car kilometers/year)

Operating expense = 2,556×11.28 ≒ 29 (million bahts/year)

* Total operating expenses74 + 29 = 103103 (million bahts/year)

c) Operating ratio

Because the operating ratio is less than 100 as shown below, the business profitability in this trial calculation is fairly good.

Operating ratio = operating expense ÷ revenues×100

=103 ÷ 204×100

≒ 5050

The shift of transport volume to the new limited express trains with reduced transport time was discussed, and a substantial increase of demand is estimated.

Based on the calculations above, increased revenues and operating expenses, etc. in the Northern Line is calculated. According to this calculation, effects of the operation seems to be fairly strong. This study is only based on the increased population whose data were obtained. However, if expected economic growth rates are included in the trial calculation of increased passengers, the number of

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