the opposite, facing and in front of.

‘across a road/room etc from’: opposite/facing
We do not use in front of to mean ‘across a road/river/room etc from’. This idea is usually expressed with opposite or facing. (AmE also across from.) There’s a garage opposite my house, (NOT … in front of-my-houser)
She stood at the other side of the table facing me. (NOT … in front of me.) The man sitting across from me was smoking a pipe. (AmE)
in front of and opposite
Compare:
There’s a bus stop in front of the school.
(The bus stop is on the same side of the road as the school.)
There’s a bus stop opposite the school.
(The bus stop is on the other side of the road from the school.)
In front of is often the opposite of behind.
The woman in front of me in the post-office queue had a complicated problem. I always find myself behind people like that.
If you are in front of a place, vehicle etc you are outside it; if you are in the front of it you are inside. Compare:
We stood in front of her car so that she couldn’t drive off.
Her husband was sitting in the front of the car. He looked frightened.
For the difference between before and in front of, see before preposition and in front of.