Project: Analysis of Branch Line Economics for Grain Transportation Client: Class 1 Freight Railroad
This study examined the economics of increasing allowable maximum weights for covered hopper cars carrying grain on railroad branch lines.
A computerized train simulation model was used to evaluate train performance and estimate fuel consumption, track maintenance costs, crew costs, and the costs of equipment ownership and maintenance for trains operating over two grain branch lines. Results of these studies were used to develop unit costs for trains of 263,000 lb. cars (current maximum weight) and for trains of cars loaded to the proposed 268,000 lb. load limit.
The primary focus of this study was the relationship between increased car weight and the changes in operating and maintenance costs for a fixed annual volume of grain.
Detailed analysis was carried out to determine expected increases in track costs, equipment costs, and bridge damage resulting from heavier axle loads. Line-specific factors were developed for each branch line to take account of variations in track parameters such as subgrade condition and weight of rail.
Savings in operating costs (crew, fuel, and locomotive and car ownership) were calculated based in the higher car capacity, and these savings were compared to the increases in track and car maintenance and bridge costs.
The study concluded that, for the branch lines studied, an increase in allowable car weight could produce net savings.