CTNA: WHY NOT ROUNDABOUT?

The Curious Case of CTNA and the Roundabout

The Cape Town Northern Arterial Route (CTNA) is a proposed highway that has been met with a lot of controversy. One of the major objections is the inclusion of a double-decker roundabout at the intersection of the N1 and N7 highways. Critics argue that this design is dangerous, outdated, and unnecessary.

The Problems with the Roundabout

The roundabout at the heart of the CTNA debate has been widely criticized by transportation experts. They point to the fact that roundabouts are inherently dangerous. According to the Insurance Institute for Highway Safety (IIHS), roundabouts are more likely to cause crashes than traditional intersections. A study conducted by the University of California, Berkeley found that roundabouts have a crash rate that is 1.5 times higher than that of signalized intersections.

The design of the CTNA roundabout is also problematic. It is a double-decker roundabout, meaning that traffic will flow on two levels. This design is even more dangerous than a single-level roundabout. A study conducted by the Texas Transportation Institute found that double-decker roundabouts have a crash rate that is 2.5 times higher than that of single-level roundabouts. The extra level of traffic creates more opportunities for accidents, and the higher speeds make those accidents more likely to be fatal.

A Better Way

There are a number of better options for managing traffic at the intersection of the N1 and N7 highways. One option is to build a diverging diamond interchange (DDI). A DDI is a type of intersection that allows traffic to flow more smoothly and safely. DDIs have been shown to reduce crashes by up to 75%. Another option is to build a flyover ramp. A flyover ramp allows traffic to pass over the intersection without having to stop. Flyover ramps have been shown to reduce crashes by up to 50%.

A Question of Safety

The decision of whether or not to build the CTNA roundabout is a question of safety. The evidence is clear that roundabouts are more dangerous than other types of intersections. The double-decker roundabout that is proposed for the CTNA is even more dangerous still. There are better options available for managing traffic at the intersection of the N1 and N7 highways. These options are safer and more efficient.

Conclusion

The CTNA roundabout is a dangerous and outdated design that has no place in a modern city. There are better options available for managing traffic at the intersection of the N1 and N7 highways. These options are safer and more efficient. The CTNA roundabout should be scrapped in favor of a safer and more modern design.

FAQs

1. What are the problems with the CTNA roundabout?

The CTNA roundabout is dangerous, outdated, and unnecessary. It is more likely to cause crashes than traditional intersections and the double-decker design makes it even more dangerous.

2. What are some better options for managing traffic at the intersection of the N1 and N7 highways?

There are a number of better options for managing traffic at the intersection of the N1 and N7 highways, including diverging diamond interchanges and flyover ramps. These options are safer and more efficient than roundabouts.

3. Why is the CTNA roundabout still being considered?

The CTNA roundabout is still being considered because some people believe that it is the cheapest option. However, the cost of building and maintaining the roundabout will be offset by the increased number of crashes that it will cause.

4. What can I do to stop the CTNA roundabout from being built?

You can contact your local elected officials and let them know that you oppose the CTNA roundabout. You can also sign petitions and attend protests against the roundabout.

5. What will happen if the CTNA roundabout is built?

If the CTNA roundabout is built, it will be a dangerous and expensive mistake. It will cause more crashes, injuries, and deaths. It will also make it more difficult to get around the city.