Present Situation and Cause:
1. Every day there are many traffic jams everywhere, causing great inconveniences to people’s daily lives.
2. Too many cars running on the streets lead to air pollution and noise pollution.
3. There are more vehicles than the streets can accommodate.
4. The construction of new roads is very slow.
5. Many drivers do not obey regulation. People lack adequate awareness of the seriousness of traffic problem.
