1. Waymo's driverless cars have been exhibiting strange behavior, with the vehicles honking at each other throughout the night in some neighborhoods. This has been causing disruption and annoyance for local residents, who have reported the constant honking as a nuisance.

2. The article suggests that this unusual behavior may be due to a software or communication issue between the self-driving cars, as they appear to be attempting to communicate with one another in an unexpected way. Waymo has acknowledged the issue and stated that they are investigating the cause.

3. The incident highlights the ongoing challenges faced by companies developing autonomous vehicle technology, as they work to ensure the safe and seamless operation of their vehicles in real-world environments. The article suggests that as driverless cars become more prevalent, addressing such unexpected behaviors will be crucial for gaining public acceptance and trust.