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"The Tesla's automation did not detect, nor was it required [to], nor was it designed to detect the crossing vehicle," Robert L. Sumwalt, chairman of the National Transportation Safety Board, said at the start of a hearing reviewing the Florida crash. Tests by the National Highway Traffic Safety Administration determined that Tesla and other vehicles with semiautonomous driving technology had great difficulty sensing cross traffic. The NTSB staff also said that Tesla's reliance on sensing a driver's hands on the wheel was not an effective way of monitoring whether the driver was paying attention. The NTSB staff recommended the use of a more effective technology to determine whether a driver is paying attention, such as a camera tracking the driver's eyes.