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Opinions we all have them and we are very attached to them. But a person’s opinion does not a fact make.
Hopefully, the opinions that we have are supported by fact. I recently read a couple of letters in the Los Alamos Monitor that were filled with very strong opinions regarding Trinity Drive and roundabouts.
People have opinions and that’s fine. But let’s look at the facts regarding roundabouts as published by reputable and mainstream engineering organizations.
To study the effectiveness and safety of roundabouts, the Federal Highway Administration sponsored a study that was carried out by the National Cooperative Highway Research Program (NCHRP) of the National Academy of Engineering.
The NCHRP-672 Report found that a well-designed roundabout provides better operational performance than a traffic signal in terms of
1. better level-of-service (shorter delays and fewer stops),
2. better motor vehicle safety , and
3. lower pollution emissions.
In addition, a roundabout has the following pros:
4. the long-term maintenance costs of the roundabout are likely to be less than the expense for a signal, because there are no signal maintenance and signal operation costs;
5. the roundabout would provide an opportunity for community beautification;
6. the roundabout would calm traffic;
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