Triple Crossing in Richmond, Virginia is believed to be the only place in North America where three Class I railroads cross at different levels at the same spot.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: Triple Crossing in Richmond, Virginia is believed to be the only place in North America where three Class I railroads cross at different levels at the same spot. ### Response: .