It is necessary for everyone to observe the law.

We should always observe the law.

I travel along this route every day.

His irregular lifestyle is having a negative impact on his health.

On this road, the principle is to keep left.

It's convenient to live in a city where transportation facilities are well-developed.

A passer-by picked up the wallet I dropped.

You need permission to pass through this road.

His business is going smoothly.

He commutes to school by bicycle every day.