1.   In Tehran, electric buses came to a halt, and passengers were stranded when the single underground subway line also lot power.

2.   In Tehran, electric buses came to a halt and passengers were stranded when the single underground subway line also lost power.

3.   In Tehran, electric buses came to a halt and passengers were stranded when the single underground subway line also lot power.

4.   In Tehran, electric buses came to a halt, and passengers were stranded when the single underground subway line also lost power.

5.   Unlike other big city public transportation networks, Tokyo has no single subway authority and passengers often must switch between private and public lines to reach their destinations.