Cayden James gives Oliver Queen an account number and says to wire the money there. He does not give a Swift Code, routing number, or even a bank name. You cannot wire money to an account number if you don't know which bank the account is in.
Fed fund wires cannot be sent at 11:30 pm anywhere in the US.
The sign that falls next to the bus is not facing the flow of traffic; the tunnel was one way and drivers could not read it if it was in place in that direction.
When William is on a school bus for his field trip, there doesn't appear to be a teacher present at any point.
When the school bus carrying William on his class trip that is stuck in traffic in the tunnel, the bus driver leaves which is in clear violation of protocol as bus drivers are not permitted to leave the passengers (especially minors) alone. This is, however, obviously an emergency and the driver / chaperone was trying to get help.