On the other hand, Ho Chi Minh City have many national highways which do not really separate local roads; moreover, they are narrow, dirty, and cracked everywhere. .
The last difference is that the traffic architecture design of Orange County is better than the one of Ho Chi Minh City. For example, one of my most interesting in traffic system in Orange county is traffic lane design. That is the "center left turn lane which is located in the middle of two-way roads. If a street has a center left turn lane, people must use it to prepare for or make a left turn or U-turn" (CVC 2146.5 – California Driver Handbook – 2013 – p.34). The streets in Ho Chi Minh city do not have this kind of lane, so it is complicated for a driver to make a turn because he or she may cause other vehicles to stop on the road. .
The second different trait of Ho Chi Minh City and Orange County can name as the civil construction planning which are the city master planning, construction materials and zoning regulations. Ho Chi Minh City and Orange County have the same spread as mentioned above, but Ho Chi Minh City's population is more than 7 million and Orange County's number is only 3 million. Therefore, the density of Ho Chi Minh is higher than Orange county. This reason may lead to the different results in the city master planning between two places. Most houses in Ho Chi Minh City are in close proximity to one another, and the popular width of a house is about 3.5m to 4.5m. .
There are many different sizes of houses along many tiny alleys in Ho Chi Minh city. The master planning of Ho chi Minh City is not organized accordingly. In contrast, houses in Orange County are the conformity. Most single houses in Orange County are much wider than the houses in Ho Chi Minh City. Next difference between two places is construction materials. Because Orange County belongs to California State where earthquakes occur commonly, the construction materials are lightweight and made of lumber.
