+Robert L. Bertini Thank you Sir for your reply. I'm actually pretty impressed. I didn't know that there was so much science and work done into traffic flows. I'm actually a Junior Year Mechanical Engg student and I was very impressed by fluid mechanics course at my university. Believe it or not, it occurred to me to approach traffic as an internal fluid flow with a boundary layer which I contemplated about, while stuck in traffic and sometimes the shower :P I feel both satisfied and disappointed. Satisfied to see such work already done, disappointed because I hate people who steal my ideas before I think of them as I had arrived at multiple ideas independently on my own LOL Maybe nothing is left to be discovered or invented in this era of the 21st Century. I will now have to shelve my ideas and the study project which I had decided to present at a local undergraduate student research contest. If I can put it this way, this field of study has been non existent. I never hear about it nor read about it. They don't even teach it in school or university. Why is it so rare Professor Robert? Or is it just in my part of the world? Whatever it is, I am mightily impressed. I wait the arrival of fully autonomous vehicles.
+Ahmad Shumayal Sincere apologies for the rant. I guess I'm poor in creativity and imagination. Also if I can ask you, would an ideal traffic flow on a motorway be, I look at speed as being only correlated to reynolds number. Turbulent (which higher reynolds number) or Laminar (with a lower reynolds number)? Or a mix of both. I think a hybrid between the both would be best since turbulent can easily ensure shorter travel times but Laminar flows have more slower flows at the boundary which we need to avoid and transfer of any momentum ofcourse. which brings me to the conclusion that high speed laminar flows can be achieved and hence ideal. And again this could only be possible with well trained drivers or .... autonomous vehicles.
Hi Ahmad - there is more than 50 years of traffic flow theory, you can take a look at some historical documents here: tft.ceng.calpoly.edu/docs.htm, and here: tft.ceng.calpoly.edu/papers.htm. Don't give up though, there are still many important questions remaining and a lot of interesting work going on!
Thank you it is very useful
Acknowledgment: "Methods of Analysis for Transportation
Operations, " by Carlos F. Daganzo and Gordon F. Newell
Goats of the T game really
Big help. Thanks!
What is v_f? Is this the max speed that can be travelled given zero density? Referring to graphs at 23:17.
final velocity in normal math. Haven't watched the whole video to that part yet. That'd be my assumption.
I was unable to follow, but all this seems AWESOME
Do we need to include zero vehicle data(Flow=0) in our road and traffic survey data
thank you for sharing knowledge
Good lesson
What would be the name of a course on this?
Civil Engineering of some sort.
nice, thank you :)
Isn't the formula for flow speed * density?
google it
Sir can you please do more lecture videos on this subject ?
how do you get 50 passengers per car? is it just for illustration purposes.
+Ahmad Shumayal Yes, just an example, a bus may have 50 passengers, for example.
+Robert L. Bertini Thank you Sir for your reply. I'm actually pretty impressed. I didn't know that there was so much science and work done into traffic flows. I'm actually a Junior Year Mechanical Engg student and I was very impressed by fluid mechanics course at my university.
Believe it or not, it occurred to me to approach traffic as an internal fluid flow with a boundary layer which I contemplated about, while stuck in traffic and sometimes the shower :P
I feel both satisfied and disappointed. Satisfied to see such work already done, disappointed because I hate people who steal my ideas before I think of them as I had arrived at multiple ideas independently on my own LOL
Maybe nothing is left to be discovered or invented in this era of the 21st Century. I will now have to shelve my ideas and the study project which I had decided to present at a local undergraduate student research contest.
If I can put it this way, this field of study has been non existent. I never hear about it nor read about it. They don't even teach it in school or university.
Why is it so rare Professor Robert? Or is it just in my part of the world?
Whatever it is, I am mightily impressed. I wait the arrival of fully autonomous vehicles.
+Ahmad Shumayal Sincere apologies for the rant. I guess I'm poor in creativity and imagination.
Also if I can ask you, would an ideal traffic flow on a motorway be,
I look at speed as being only correlated to reynolds number.
Turbulent (which higher reynolds number) or Laminar (with a lower reynolds number)? Or a mix of both. I think a hybrid between the both would be best since turbulent can easily ensure shorter travel times but Laminar flows have more slower flows at the boundary which we need to avoid and transfer of any momentum ofcourse.
which brings me to the conclusion that high speed laminar flows can be achieved and hence ideal.
And again this could only be possible with well trained drivers or .... autonomous vehicles.
Hi Ahmad - there is more than 50 years of traffic flow theory, you can take a look at some historical documents here: tft.ceng.calpoly.edu/docs.htm, and here: tft.ceng.calpoly.edu/papers.htm. Don't give up though, there are still many important questions remaining and a lot of interesting work going on!
i m from india and in m. tech we also studying this sub so plese send me all lectures on this subject