"One of the problems that we have with the existing rail bridge is that we do not have a window with sufficient time to cross into Mexico," said Pete Sepulveda, the Cameron County administrator, referring to the time when rail traffic does not intrude on vehicular and pedestrian traffic in urban areas.
The problems Network Rail has since had with electrification are "utterly different" from what HS2 has to face, Higgins insisted.
Re "A Young and Unlikely Activist Who Got to the Tea Party Early" (front page, Feb. 28): Activists like Keli Carender would have more credibility if they had specific solutions for the problems they rail against.
During a conversation with Ms. Rajesh, moderated by the journalist Vrinda Gopinath, Mr. Trivedi spoke at length about the problems ordinary rail employees face and how they soldier on.
The problems at Network Rail came to a head earlier this year when the government shelved major promised upgrades to rail lines in the Midlands and the north of England, blaming the infrastructure owner's "unacceptable performance".
The problems at Network Rail have contributed to increasing discontent among passengers.
"The problems in recent rail mergers have been ones of execution, not of design," he said in an interview conducted by e-mail.
"When the scale of the problems at Network Rail became clear in June 2015, the Secretary of State was advised for the first time to pause the electrification of the Transpennine and Midland Main Line routes.
I may be a northerner, but I am sensitive to the problems high speed rail will present the people who live near the line in southern England.
This paper mainly concerns the problem of rail corrugation.
A finite element vibration model of a multiple wheel rail system which consists of four wheels, one rail, and a series of sleepers is established to address the problem of rail corrugation in high-speed tracks.
