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[TLSI] Paths of the vehicles making left turns and those making right turns cross each other. |
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Please refer to the 4-leg at-grade intersection and the TLSI.
In the 4-leg at-grade intersection below, making a right turn from east to north is difficult if there is a straight through traffic from south to north.
However, on the TLSI, right turns from east to north are not affected by straight through traffic from south to north.
Right turns can be freely made from east to north when there is straight through traffic from east to west.
On the TLSI, the straight through signal from east to west is twice as long as on the at-grade intersection, this is because the intersection is divided into lower and upper levels.
On the at-grade intersection, vehicles making right turns are affected depending on the flow of other traffic and signals.
However, vehicles making right turns are not affected in the TLSI, but only those making left turns are affected. (Even then, the effect is minor.), because the rest of the traffic is straight through signal from east to west.
In other words, duration of signals is different. It could be easily mistaken if it considered the same as at-grade intersection.
Please consider it after reviewing the characteristics of the TLSI.
In addition, please refer to the following diagram.
The following is a diagram of single point urban interchange (SPUI) used in Yanjae Station Intersection and Garak Market Intersection.
The sections marked A and B are the same as the TLSI.
As it was mentioned in the question, making left turns to A and B are affected by vehicles making right turns to A and B.
However, is the traffic, particularly the right turns, affected by the structure of the road in real traffic conditions?
In the underlined sentence above, the statement that the sections A and B have the same structure is limited to the structure of part of the road mentioned in the question and does not mean the entire system of the road is the same.
The TLSI by RoadNext has its own traffic flow characteristics.
Duration of signals on the TLSI is undeniably different from the conventional at-grade intersection.
Green light in the TLSI has more than twice the duration of the conventional intersection and has reduced waiting time.
Therefore, please consider the advantages of the system by considering all signals and not only left turns.
Once again, the TLSI applies two set of the two-phase signal system, one for the upper level and the other for the lower level.
We will post more details by building on the current information.
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