Waymo is reportedly rolling out additional safety measures for its self-driving vehicle fleets, reintroducing safety drivers and installing cameras to monitor driver fatigue. The Information reports that these changes were put into place due to safety concerns, and they come after a handful of recent traffic incidents. Within the last few weeks, Waymo has put safety drivers back behind the wheels of its more advanced vehicles, which have been operating without such drivers for some time, and across its broader fleet, the company has added co-drivers to its daytime shifts as well as its night time shifts. The co-drivers are part of Waymo's effort to keep its safety drivers alert, and The Information reports that the company has also been installing cameras aimed at drivers' faces for the purpose of monitoring when they might be nodding off. In June, a safety driver appeared to fall asleep while behind the wheel of one of Waymo's Pacificas, causing an accident after he inadvertently turned off the driving software.