; (2) revise the requirements set forth in section 174.310(a)(2) of title 49, Code of Federal Regulations— (A) to limit all trains to a maximum speed of 50 miles per hour; and (B) to limit high-hazard trains carrying 20 or more cars loaded with flammable liquids to a maximum speed of 40 miles per hour while that train travels within the limits of high-threat urban areas (HTUAs) (as defined in 1508.3 of title 49, Code of Federal Regulations, unless all tank cars containing a Class 3 flammable liquid meet or exceed the DOT specification 117 standards, the DOT specification 117P performance standards, or the DOT specification 117R retrofit standards set forth in subpart D of part 179 of title 49, Code of Federal Regulations, including DOT–105A, DOT–105H, DOT–105J, DOT–105S, DOT–112H, DOT–112J, DOT–112S, and DOT–120S tank cars; (3) require rail carriers operating high-hazard trains to comply with the requirements applicable to high-hazard flammable trains under section 174.310 of title 49, Code of Federal Regulations; (4) require any Class I railroad transporting hazardous materials— (A) to generate accurate, real-time, and electronic train consist information, including— (i) the identity, quantity, and location of hazardous materials on a train; (ii) the point of origin and destination of the train; (iii) any emergency response information or resources required by the Secretary; and (iv) an emergency response point of contact designated by the Class I railroad; and (B) to enter into a memorandum of understanding with each applicable fusion center to provide the fusion center with secure and confidential access to the electronic train consist information described in subparagraph (A) for each train transporting hazardous materials in the jurisdiction of the fusion center