Very informative class. I was assigned to my first roundabout project recently. Watching this video sure would guide me on the right path. The examples shown drive home the point. The roundabout design for that skewed intersection(1:05:00) is pretty clever. Thank you very much for posting this.
30:00 very good point about driver will naturally ignore the pavement marking and take the "fastest speed path" . Design need to moderate traffic speed with the natural driving behavior in mind.
I'm looking at the traffic circle at 29:00 where the driver entered into the circle and then "illegally" shifted lanes. Is it possible to prevent that action from happening by extending the white dashed pavement markings all the way to the solid white hatched markings, at each leg, where the division between the two lanes are distinguished? I can see where there may already be some confusion between single and two lanes merging in a roundabout. I think the distance is too short for the driver to react in time to correct their decisions. What is the reaction time for drivers in a roundabout/traffic circle? In addition, how does it change when the radius of the design increases or decreases? Thank you! P.S. I'm also wondering if the issue with drivers at 29:19 is caused by alignments that are not meeting the circle at 90 degrees? How was this issue resolved? What is the desired angle that the alignments meet at the center? (Thank you)
Why am I voluntarily watching a 90 min presentation about roundabouts and enjoying every second of it? Damn you, Biffa Plays!
34:54 I’m not a traffic engineer (just watching for fun), but this really helped me understand why those long winding lead ups to roundabouts exist!
Very informative class. I was assigned to my first roundabout project recently. Watching this video sure would guide me on the right path. The examples shown drive home the point. The roundabout design for that skewed intersection(1:05:00) is pretty clever. Thank you very much for posting this.
That was very insightful👏
Thanks a lot
30:00 very good point about driver will naturally ignore the pavement marking and take the "fastest speed path" . Design need to moderate traffic speed with the natural driving behavior in mind.
I'm looking at the traffic circle at 29:00 where the driver entered into the circle and then "illegally" shifted lanes.
Is it possible to prevent that action from happening by extending the white dashed pavement markings all the way to the solid white hatched markings, at each leg, where the division between the two lanes are distinguished?
I can see where there may already be some confusion between single and two lanes merging in a roundabout. I think the distance is too short for the driver to react in time to correct their decisions. What is the reaction time for drivers in a roundabout/traffic circle? In addition, how does it change when the radius of the design increases or decreases?
Thank you!
P.S. I'm also wondering if the issue with drivers at 29:19 is caused by alignments that are not meeting the circle at 90 degrees? How was this issue resolved? What is the desired angle that the alignments meet at the center? (Thank you)