As is portrayed in this picture, two snails are climbing up a tree freely, and the higher one looking at a flow of cars being caught in a traffic jam, said to the other that “come on, see the crowded cars, they are slower than us”.
What the picture is intended to convey is thatthe swift development of private car meets with the requirements of public traffic, but also arouses the negative externality. Heavy transportation pressure in many cities may bring much inconvenience to people and exert adverse impact on the environment. On the one hand, when traffic jam happens, short distance in the past now seems to become terribly long, and drivers could do nothing but to wait. Therefore, a lot of precious time has been wasted on the road. On the other hand, exhausted gas emitted by cars has increased the burden of environment, especially air pollution. And therefore, the health impact of the pollution is becoming a bigger concern in china's smoggy capital.
Therefore, effective measures should be taken to alleviate the traffic jam. Firstly, planned development of the number of private cars should be carried out. Secondly, public transportation such as buses and subways, which are low-carbon transportation means, should be encouraged and promoted. The effective implementation of the measures must benefit the coordinated development of society and economy, environment and ecology.