Prioritize lan-to-lan VPN traffic

Hi!
We have task to prioritize lan-to-lan VPN traffic over LAN user traffic. Will it be enough to create one simple queue?
Like this:
target - remote lan2lan gateway ip
max limit 50M upload/download
limit at 40M upload/download
queue type default
(total wan bandwidth is 50Mbit)
Will this simple queue guarantee 40Mbit to VPN traffic?