to view relevent blogpost: click here
For those who do not visit the official APB blog or forums often, there was a small update explaining some of the latency problems some of you may have been experiencing.
Summing up the post, someone has been ddosing them. (distributed-denial-of-service attack) However, they did tweet out that all servers are back in service.
All servers are now back in service. Thanks for your patience.
— APB Reloaded (@apb_reloaded) April 19, 2017