Umair Durrani

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Questions related from Umair Durrani

What resources do you recommend for learning about shockwaves in traffic stream?

Please recommend something related to the fundamentals of shockwaves in traffic

08 August 2017 227 0 View

What are the units of parameters in the equations of Wiedemann 99 car following model?

You can see the equations in the attached image. I think that the first equation has CC8 and CC9 in meters per squared second, speed in kilometers per hour and delta t in seconds. The value 80 is...

06 June 2016 3,619 4 View

Are data mining techniques for time-series useful in developing a data-driven car-following model?

Can we apply any data mining technique on time-series data such as provided by NGSIM project to model the car-following behavior i.e. uninfluenced driving, following a lead vehicle, emergency...

12 December 2015 9,501 2 View

In the Wiedemann 74 car-following model is the lead vehicle assumed to be moving at uniform speed?

I am referring to figure 2-1 in: Wiedemann, R., Reiter, U., 1992. Microscopic traffic simulation: the simulation system MISSION, background and actual state. Proj. ICARUS Final Report. Brussels,...

12 December 2015 9,323 3 View

What is the time lag in GHR car following the model composed of? Only reaction time or something more?

Aghabayk et. al (2015) explained that 'T' is the driver's reaction time in GHR model (page 86). While in the article 'Traffic Dynamics. Studies in Car Following', Chandler et. al. (1958) stated...

12 December 2015 9,220 2 View

What is your (writing) advice to an engineering graduate student writing a Ph.D. thesis?

What is it that you wish you'd have done differently while writing your thesis? What are your tips on writing good and consistently? Any book/guide about writing that you'd like to share?

01 January 1970 5,342 4 View