hi
I need help in this assignment

.. Taxi is assigned to a route which is comprised of stops on certain roads, the driver drives taxi according to availability....

it is long one but I have problem in previous paragraph
Entities: Taxi,route,stops,driver
Taxi---route (1 to 1 relationship)
route---stops(1 to many relationship )(right?)
about the availability , how can I represent it?
I just put relation between taxi and driver (1 to 1) but I do not think it is correct

Nor do I, it appears to be a "many to many" because of the statement "the driver drives taxi according to availability". This implies:
- sometimes driver A drives taxi X
- sometimes driver A drives taxi Y
- sometimes driver B drives taxi X
- sometimes driver B drives taxi Y

That implies a new relation, perhaps with a date to handle the "sometimes".