is basically how many drivers would enter if they knew that whenever they were available there would be a passenger immediately there for them and this expression is how many passengers would enter if they knew that whenever they requested a ride there would be immediately be a driver there to serve them that's the same entry rate we had before and so that's that's what put is basically available the throughput is a min of available supply and available demand so that's really nice because you can visualize it as sort of a demand and