The Ashman Phenomenon refers to the behavior of driving observed at roundabouts, where drivers tend to slow down or stop at the point of entry instead of going at their intended pace.

The Origin of Ashman Phenomenon

The term"Ashman Phenomenon" was coined by a British traffic engineer Mr. Howard Ashman, who first became aware of this phenomenon in the 1970s.

Why Does the Ashman Phenomenon occur?

The cause of Ashman Phenomenon's cause is not yet known, but there are several theories that suggest the behavior is due to drivers' confusion about their priorities or their perception of responsibility to surrender to other road users.

Effect of Ashman Phenomenon on Traffic Flow

The Ashman Phenomenon can create significant delays and interruptions to traffic flow, in addition to an increase in emissions and fuel consumption because drivers are slowing down or accelerating.

Countermeasures to Minimize Ashman Phenomenon

To reduce the Ashman Phenomenon important to educate drivers about the rules and expectations for roundabouts and to create roundabouts with clear and consistent indications and signs.

Conclusion

The Ashman Phenomenon is a fascinating and complex driving style that continues to challenge traffic engineers and researchers. Although the reason for it is not known but it is obvious that it has a significant effect on traffic flow as well as the surrounding environment.