#trafficflowmodeling

Macroscopic traffic flow models, Greenshields' Equation, Underwood traffic flow model, Greenberg Model, traffic flow models, Macroscopic traffic flow modeling, Q=KV, comparison of macro traffic flow models, speed, flow, density, relation between speed and density, non-linear models of traffic flow
In this session, #Greenshields #Underwoodmodel and #Greenbergmodel Models are discussed and compared. Two numerical examples are also taken to demonstrate their applications.
The link for other videos in Traffic Engineering
L-1 Derivation of Q = KV • #traffic, flow paramet...
L-3 LOS on Two-Lane Roads: • #trafficengineering, #...
L-4 LOS on Multilane Highways: • #LOS, #trafficengineer...
L-5 How to Reduce Conflict Points: • #traffic, How to reduc...
L-6 Concept of Critical Gap : • #traffic, #gap, #headw...
L-7 Critical Gap at Uncontrolled Intersections: • #capacity, #gap, Criti...
L-8 Critical Gap at Roundabouts: • #capacity, #gap, Criti...
L-9 Capacity of Roundabouts: • #traffic, #Capacity, C...
L-10 Dilemma Zone at traffic signals: • #traffic, #signals, #a...
L-11 Design of Traffic Signals: • #traffic, #signals, #t...
L - 12 Traffic Volume Studies Part - 1 • #traffic, #volume, #v...
L - 13 Traffic Volume Studies Part - 2 • #traffic, #volume, #v...
L - 14 Shockwave Analysis, Part - 1, along a highway: • #trafficengineering, #...
L-15, Shockwave Analysis, Part - 2, at Traffic signals: • #shockwaves, #traffic,...
L-16 Shockwave Analysis, Part - 3, Propagation of Shock Waves: • #shockwaves, #traffic,...
: L-17 Speed studies: • #speed, #traffic, #tra...
L - 18 Passenger Car Units: • #PCU, #traffic, Passen...
L - 19 Traffic Forecasting: • #traffic, #forecasting...
L - 20 Saturation Flow at Signals: • #flow, #Signals, #capa...
L - 21 Speed and Delay Studies: • #traffic, #Speed, #del...
L-22 Delay at traffic signals: • #delay, #signals, Dela...
L-23 Five Pillars of Road Safety: • #Roadsafety, #crashes,...
L-24 Another Look at Speed Distribution: • A new look at speed di...
L-25 Congestion Charging: • Concept of Congestion ...
L-26 Surrogate Safety Measures: • Concept and Explanatio...
L-27 Toll Fee rules in India: • #FASTAG Toll Rate Poli...
L-28 Car Following Models: • Car following models w...
L-29 Traffic Calming Measures: • What is Traffic Calmin...
L-30 Speed - flow curve: • speed-flow relation. H...
L - 31 Road Signs: • Road Signs, Different ...
L - 32 Braking and Acceleration Characteristics: • Braking and Accelerato...
L - 33 Traffic Islands and their classification : • Traffic Islands and th...

[@samb23692]

Very crisp explanation sir. Looking forward to lot more complex topics from you.

[@SatishIITR]

Thanks Sidharth, Keep watching.

[@pritidas9034]

Very useful and interesting lecture, thank you Sir for sharing.

[@SatishIITR]

Thanks Ms. Priti, Keep watching and send the channel links to your friends also

[@VVinayakaRamBPHC]

Very Lucid and crystal clear... Wonderful efforts sir... Looking forward for the next lecture...

[@SatishIITR]

Thanks

[@abdheshsinha2984]

Sir, you explain this topic very nicely.

[@SatishIITR]

Thanks, keep watching.

[@raggun9631]

One of the best lectures I have heard sir.....short , sweet and effective.... tq🙏

[@SatishIITR]

Thaaank yooooou so much. Please share the link with your friends also.

[@raggun9631]

@@SatishIITR sure sir..... Thanks for ur efforts

[@keshavsikhwal866]

maja aa gya sir ...please make more videos

[@SatishIITR]

Thanks, there are many such more, see the list in the description box.

[@bivinag.r4701]

Hello sir..such a neat explanation.

[@SatishIITR]

Thanks, keep watching. My first video was on How to derive Q = KV

[@bivinag.r4701]

@@SatishIITR yes sir. Keenly following the lectures and already subscribed for new videos.. It is very helpful of students and faculties. Sir upload some videos of VISSIM software as well.

[@SatishIITR]

@@bivinag.r4701 Thanks

[@aydnaydin9109]

Prof. Chandra in the first example the equation means Greenberg Model?

[@SatishIITR]

Yes, it is the form of Greenberg model

[@vishnutripathi3005]

Sir I have one question why greenshields model is assumed to be linear for density-speed relationship

[@SatishIITR]

This is not an assumption. Greenshield collected data on a highway using time lapse photography in 1934 and fitted the relation between the speed and the density and he found that the relation is linear.

[@vishnutripathi3005]

@@SatishIITR Sir then why others are not getting same or different relationship

[@SatishIITR]

@@vishnutripathi3005 Greenshields model is the simplest one and it was derived at a time when there were not many gadgets available either for taking field data or for making long calculations. This was the fiirst atempt to relate traffic flow parameters. This equation gave directions to other researchers and also later opened anew field of traffic Engineering. Further developments were provoked by this research only.

[@vishnutripathi3005]

@@SatishIITR thank you so much sir

[@shawnmarkose1950]

Sir
Should we not consider the negative sign of b

[@SatishIITR]

if you initially assume u = a - bk, then negative sign is not considered.

[@shawnmarkose1950]

@@SatishIITR
Thank you sir