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2. National Motor Freight Classification - Wikipedia

   en.wikipedia.org/wiki/National_Motor_Freight...

   The National Motor Freight Classification ( NMFC) is a North American voluntary standard that provides a comparison of commodities moving in interstate, intrastate and international commerce via freight shipment. The standard is developed and maintained by the Freight Classification Development Council (FCDC) and published by the National Motor ...

3. Rail speed limits in the United States - Wikipedia

   en.wikipedia.org/wiki/Rail_speed_limits_in_the...

   Passenger trains are limited to 59 mph (95 km/h) and freight trains to 49 mph (79 km/h) on track without block signal systems. (See dark territory .) Trains without "an automatic cab signal, automatic train stop or automatic train control system "may not exceed 79 mph (127 km/h)." The order was issued in 1947 (effective December 31, 1951) by ...

4. Minimum railway curve radius - Wikipedia

   en.wikipedia.org/wiki/Minimum_railway_curve_radius

   Minimum curve radii for railways are governed by the speed operated and by the mechanical ability of the rolling stock to adjust to the curvature. In North America, equipment for unlimited interchange between railway companies is built to accommodate for a 288-foot (87.8 m) radius, but normally a 410-foot (125.0 m) radius is used as a minimum ...

5. Axle load - Wikipedia

   en.wikipedia.org/wiki/Axle_load

   Axle load. The axle load of a wheeled vehicle is the total weight bearing on the roadway for all wheels connected to a given axle. Axle load is an important design consideration in the engineering of roadways and railways, as both are designed to tolerate a maximum weight-per-axle (axle load); exceeding the maximum rated axle load will cause ...

6. Freight rate - Wikipedia

   en.wikipedia.org/wiki/Freight_rate

   Freight rate. A freight rate (historically and in ship chartering simply freight[ 1]) is a price at which a certain cargo is delivered from one point to another. The price depends on the form of the cargo, the mode of transport ( truck, ship, train, aircraft ), the weight of the cargo, and the distance to the delivery destination.

7. Railroad classes - Wikipedia

   en.wikipedia.org/wiki/Railroad_classes

   Railroad classes are the system by which freight railroads are designated in the United States. Railroads are assigned to Class I, II or III according to annual revenue criteria originally set by the Surface Transportation Board in 1992. With annual adjustments for inflation, the 2019 thresholds were US$504,803,294 for Class I carriers and US ...