Traffic congestion has been one of the obvious and significant 
problems in Phnom Penh. Besides public stress on the road due to the 
traffic jams, traffic congestion impacts negatively on the environment 
and the economy. How much money have people burned uselessly through the
 gasoline consumption while sitting in a traffic jam?  How much time 
have people wasted as a result of traffic congestion? The reality is 
that this happens every day, especially from 6 am to 8 am, and 4 pm to 7
 pm. Needless to say, resolving this issue has the potential to make 
Phnom Penh a better city economically and environmentally. In order to 
come up with solutions we first need to understand why traffic 
congestion has become such an issue. This begs the question: “Is the 
traffic congestion in Phnom Penh mainly the result of urban 
development?”
Urban development, by its nature brings more people into a city. 
Phnom Penh is the capital city of Cambodia, and it is the heart of 
various forms of development including infrastructure, services, and 
health care. For the last decade there has been a trend which has seen 
people in rural areas moving to find jobs and build new lives in the 
city. In 2011 it was estimated that 100,000 residents had migrated to 
Phnom Penh, increasing its population to approximately 2 million 
people.  At the same time, according to the Cambodia’s Transportation 
Ministry’s report released in the same year, there was an estimated 
800,000 motorbikes and 170,000 vehicles in Phnom Penh. These numbers are
 anticipated to continue to increase every day.
Two of the common causes of the traffic jams anywhere are small roads
 and too many vehicles. While these increases in population and vehicle 
usage have been happening, the numbers of roads and their sizes in Phnom
 Penh have remained more or less the same. This seems to suggest a clear
 link between urbanization and traffic congestion: more people with more
 vehicles and limited expansion of the road network. However, according 
to some people in Phnom Penh we have interviewed, the key causes of 
traffic congestion are beyond the urban development.

 
When asked what he thought of as the main causes of traffic 
congestion in the city, Sopheap, who is a student at Royal University of
 Fine Arts, said that urban development is unquestionably one of the 
reasons to cause traffic jams. Nonetheless, to him the issue that first 
needs to be dealt with is that of people disobeying the traffic laws. He
 added, “Many of the time, it is not the small roads that is the problem
 but how people drive, and even a motorbike could cause the whole 
traffic jam if the traffic laws are not obeyed.”
Sok Hout, a student in SETECH Institute, he pointed out another 
common cause of traffic jams. He said that traffic jams happen more 
frequently in rainy season because when there is heavy rain many roads 
would get flooded, causing un-flooded roads to be even busier. As a 
result, people get stuck on the roads for hours. You can imagine what a 
significant issue this is given that rainy season lasts six months a 
year.
These students have highlighted real issues in Phnom Penh experienced
 by all of its residents, in addition to the problems that arise from 
urbanization. As such, all of these issues need to be addressed in order
 to reduce traffic congestion. So far, we have efforts from the 
government to reconstruct some roads as well as build the Skybridges, 
such as the 7 Makara Skybridge, to ease the problem of traffic 
congestion in the city. Nevertheless, the traffic law enforcement and 
the sewage system are still seen to have limited improvement even though
 they are key factors to making traffic in Phnom Penh a lot better and 
less busy.
Source: Urban Voice