Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing (antri). The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, congestion is incurred. As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in.
Traffic congestion occurs when a volume of traffic or modal split generates demand for space greater than the available road capacity, this point is commonly termed saturation. There are a number of specific circumstances (keadaan) which cause or aggravate (menjengkelkan, memperburuk) congestion; most of them reduce the capacity of a road at a given point or over a certain length, or increase the number of vehicles required for a given volume of people or goods.
Talking about traffic jam makes my face look upset. Why? Because I hate being trapped in traffic jam, and so does everyone. My friends and I always come late to get campus just because of traffic jam.
Sometimes traffic jam becomes so heavy that I cannot get my campus punctually even though I have already scheduled my daily activities well.
I need more or less twenty minutes to get my campus, so I always go to my campus thirty minutes before the exact time which the class starts.
I am considering moving to a boarding house close to my campus. I want to spend more time doing the thing I really enjoy doing in my free time instead of being trapped in traffic jam.
Nevertheless, I don’t want to give up my present boarding house. I wish the government would solve traffic jam issue immediately.
As my experiences being trapped in traffic jam, there are many causes of traffic jam in Makassar, the city where I am living now. They are public vehicles (called ‘pete-pete’) that exceed the limits and are careless, ‘bemo or becak’ that moves too slowly, broken roads, demonstration of students, an accident, vehicles that are parked in the side of the roads, flood, and police who are checking the driving license.
Among them the most problem making traffic jam is public vehicles or ‘pete-pete.’ The number of ‘pete-pete’ in Makassar already exceeds the demand.
I always become upset when they, the drivers of ‘pete-pete,’ move suddenly to the side of the road to pick passenger up. I, who is behind them, am surprised and have to stop on the brakes suddenly too. It’s of course very dangerous; I may hit them.
If I had power or authority, I would convert ‘pete-pete’ into buses like in Surabaya. Additionally, I would forbid trucks, which make traffic jam, to use the main roads at the busy time.
The Problems of traffic jam at metropolis city is more complex. also it happened at Makassar city. The Problems caused the long time in make a trip from origin to destination, have consequences more vehicle operating expenses magnitude with more voice pollution height and air pollution. One of the factor that influence traffic jam at makassar city is intersection quantity, both for traffic light also intersection doesn't use traffic light. and another factor is the quantity of road that used to do to set back direction (u turn), so that retard traffic current smoothness. This study aims to detect the length of time of the vehicle U-turn caused the traffic volume.
by Hendra Susanto
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