According to Chapter 4D, section 4D.18 of the U.S. Department of Transportation's (DoT) Manual on Uniform Traffic Control Devices (MUTCD), both vertical and horizontal setups are completely fine.

The required radius guide is outlined in the Manual on Uniform Traffic Control Devices (MUTCD ... monitoring vehicle volumes at various times of day which means the sequence/ signal timing ...

which oversees the nation’s air traffic control system, through a period of growing scrutiny and recent high-profile safety issues. According to a statement from the FAA, “Tim Arel ...

The US Federal Aviation Administration’s top air traffic control official plans to leave ... of the unit’s antiquated technology systems. Tim Arel, chief operating officer of the FAA’s ...

Our Air Traffic Control system is dangerously outdated and must rapidly modernize to avoid horrific disasters.

Tim Arel, who is chief operating officer of the FAA Air Traffic Organization, is taking part in the U.S. Transportation Department's voluntary deferred retirement program, the spokesperson said.

The Federal Highway Administration’s Manual on Uniform Traffic Control Devices establishes a standard that states: yield or stop signs shall not be used for speed control. It goes on to state ...

Shortly after the three managers at DCA were forced out of their jobs, the FAA’s chief operating officer of air traffic control, Tim Arel, announced on Wednesday that he would be retiring early. Arel ...