"I am at the bus station now."
Translation:Я зараз на автостанції.
Вокзал is actually any station. Well, it's actually station's building and station is станція. But nowadays we use вокзал for the station itself too.
There are залізничний вокзал (train station) which is commonly refered to as just вокзал and автобусний вокзал or автовокзал (bus station). There is also (though really rare in Ukranian) аеровокзал (airport terminal)