At least you could display a message that says "this lane is reserved. Open lanes: 6, 7"

6_7 18 hours ago | parent | next [-]

I'm sorry which lanes are open again?

	▲	stasomatic 9 hours ago \| parent [-]
		Did you really just claim a username to reply? Love it, someone’s more bored than me. 9-10.

stuaxo a day ago | parent | prev [-]

Available lanes are lit green and reserved are red ?

(Or something more complex)