Transportation Engineering

Transport systems planning and engineering, focussed on Intelligent Transport Systems (ITS), Traffic Engineering and Optimization, | Review and cite TRANSPORTATION ENGINEERING protocol, troubleshooting and other methodology information | Contact experts in TRANSPORTATION ENGINEERING to get answers

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Questions related to Transportation Engineering

How can I determine percetion reaction of driver? or Methods of determining/measuring Percetion Rection Time from field data?

I would like to measure the perception reaction time of driver when following or passing leading vehicle. Available methods and data needed. Some references is appreciated.

23 July 2016 4,898 3 View

What is the Gap Acceptance parameters/Criteria of a driver? What data would be needed to calibrate AASHTO passing sight distance (PSD) formula?

I am trying to calibrate AASHTO Passing Sight Distance (PSD) for our developing countries highway. I am worried about the data needed and process of calibration.

20 July 2016 8,072 3 View

How to make a fuzzy-logic based parking demand model? Any suggestions?

I am working on Parking demand modelling for local area plan. I am into research on fuzzy based parking demand model incorporating human behavior for a realistic prediction. Need your views and...

11 July 2016 9,291 8 View

Any examples of use of different design speeds for horizontal and vertical road alignment?

Can anyone give examples of documents which suggest this practice? It seems not to be a good idea, but maybe there is some valid reasoning behind it.

05 July 2016 7,336 10 View

What is the maximum number of signal timing plans during the day?

How many times can I change signal timing plan at isolated intersections during the day?

01 July 2016 3,461 3 View

Exposure to risk of equestrians on UK roads?

I'm trying to calculate the exposure to risk of horse riders in the UK when riding on road to collisions i.e. collisions per rider per km. Does anybody have any values of the average amount of...

06 June 2016 2,422 1 View

I`m looking for scientific research about rumble strips outside USA?

We are studying the feasibility of using rumble strips to reduce the ROR accidents in Chile. We are looking for research and standards in Europe, South America and Oceania about this device.

18 May 2016 7,999 5 View

Are there reputable methods for quantifying 'walkability' in urban environments?

I am aware of several methods/tools for measuring the ease with which a pedestrian can traverse urban environment. While they make good sense, none of them is based on any traceable research...

13 May 2016 4,518 9 View

How long do europeans spend to search a free parking lot?

I would like to know if there is any study that estimates how many minutes europeans spend to search a free parking lot per trip, for different urban zones.

13 May 2016 2,912 3 View

How to do Sampling for Time Headway Analysis in Urban Roads?

Hello, I am trying to do a study on time headway on an urban road that is preceded with a signalized intersection. After gathering the necessary data, I had to do a sampling process to eliminate...

03 May 2016 2,793 6 View

How can I detetmine safety of a corridor (includes one RCUT intesection) modeled in VISSIM?

I am modeling a corridor with eight 4 leg and one RCUT intersection. the corridor is coded in VISSIM. I used the SSAM, but does it work for RCUT intersections too? The values I get are not very...

20 April 2016 9,579 4 View

Is there tables to get trip generation rates for marine yard in Gulf area?

I am looking for tables to estimate trip generation rates for marine yard in gulf area specially for industrial if you have for any other country that is also good

13 April 2016 1,080 2 View

How can i use DEM or other techniques to avoid survey for preparation of DPR of a PMGSY Road?

This is for our minor project. Time available is a month. We are trying for some alternative way for preparation of DPRs for PMGSY roads as against the traditional way of going for the surveys and...

08 April 2016 5,924 1 View

What is the best statistical model for airport access mode choice?

Read 7 answers by scientists to the question asked by Mosabbir Pasha on Mar 22, 2016

22 March 2016 5,477 7 View

Is there prospect for Biobutanol becoming entirely future Motor Fuel?

The discovery and advances of genetically adapted microorganisms, has set the phase for bio butanol to surpass ethanol as a renewable fuel. Bio butanol displays great potential as a motor fuel...

20 March 2016 2,060 3 View

In geometric design of highways when a horizontal curve can called as a sharp curve and a flat curve?

I need some geometric specification like radius of curve or degree of curve etc.

13 March 2016 4,328 3 View

May any one share papers about measuring induced traffic ?

I do not have access to sources , I need papers on topics like "Is induced traffic measured by survey ? " and other topics in this regard ! Thanks here in Afghanistan we do not access to these...

11 March 2016 7,992 3 View

Can someone suggest leading research on the relationship between pavement quality and crash risk on motorways?

After doing preliminary research scan (lots and lots of semi-relevant research), I am still looking for research on motorway conditions where pavement quality generally good, and the variation in...

04 March 2016 9,961 5 View

What's relationship between DS and PCI?

Texas A&M Transportation Institute use DS(distress score) as pavement distress indicator. it's range is from 1 to 100. but what's difference between PCI and DS?

21 February 2016 5,103 1 View

How to simulate crashes in VISSIM?

Hello everyone, I am now trying to simulate crashes in VISSIM 7.0. I know VISSIM could not generate crashes during the simulation. So I am looking for some alternative measures, such as add one...

18 February 2016 2,013 3 View

Does anybody know why there is some aggregate gradation range for base and subbase material in all pavement specifications?

For example, AASHTO recommended six aggregate gradation range (A to F). How can a designer select a special range for a road base or subbase materials? How have these special ranges been...

12 February 2016 5,864 7 View

What parameter can I change in VISSIM to match the speed and volume to observed data?

Hi there, Thank you for concerning about my question. I am new to VISSIM. I am now trying to match the average speed and volume of specific data collection point to the observed loop detector...

04 February 2016 2,009 11 View

Does anybody know why there is some aggregate gradation range for base and subbase material in all pavement specifications?

For example, AASHTO recommended six aggregate gradation range (A to F). How can a designer select a special range for a road base or subbase materials? How have these special ranges been...

02 February 2016 2,864 7 View

Where can I get design guidelines in making a community or within CBD a non-motorization transport user-friendly?

I need it for my literature review for planning strategies in implementing non-motorization as a sustainable transport? I only have one and is published way back 1995 by the Florida Department of...

02 February 2016 4,367 4 View

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