system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why are internet upload speeds always much slower than download speeds?
gpt
I have 10 lanes on a highway that can go in either direction.

Most people want to leave the city, only a few want to go into it -- so dedicate 8 lanes to outbound traffic and 2 lanes to inbound traffic.

Same thing with the Internet.