Please note that as per IRC-37, for single carriageway (undivided), the pavement should be designed for traffic estimated based on larger of two VDF values obtained for the two directions of traffic. Please ignore the statement in my video that average of the two VDF values should be taken for undivided carriageway. sorry for this miss.
Thank you so much. Please share the link with as many students as possible for more dissemination. This is the only motive behind starting this channel.
Have been following you since you started the channel. Sir can you collaborate with other professionals and provide video tutorials of different software packages used in transportation engineering.
A bus has two axles. front axle with single wheel on either side and rear axle with dual wheels on either side. shall we calculate and add the VDF(front)+VDF(rear)=VDF(effective) for each vehicle?
First of all thank you for your video which has a great help in pavement design as well as for road infrastructure management and maintenance. And currently, I am working on road user’s fee revenue generation. The vehicles are going to pay for the road maintenance as per their damaging effect on the road infrastructure from Bajaj to Sino Truck. Do you think it is appropriate to propitiating the payment ratio based on their damaging effect factor is right?
The basic philosophy is same. Axle load divided by the standard load and then raise to the power 4. Take weight of each axle and calculate VDF as suggested in this video.
In case of tandem axle...which wheel load should be considered? Like 2no axle load 400kg 3no axle load 500kg then which wheel load should be considered for calculation?
Sir nicely covered the topic. However now adays the vehicles have single axle with single wheel at back. How to treat such vehicles for vdf?. They are not completely tandem or tridem with dual wheel set. Pls elaborate on this.
Sir, I have doubt, as we convert all commercial axle to standard axle like single axle to standard single, tandem axle load to standard tandem axle load, but after we get standard axle load for different different axle, then how we can sum their VDF And assume we have VDF about 2 per vehicle, but here for 2 which axle is considered for design, single axle, tandem axle, or tridem?
I did not understand your point well, but let me try to explain. Each axle will cause some damage to the road. Take a three axle truck, for example, the VDF of its front axle is 0.5 (say) and that of the rear axle is 5.7. So the damaging effect of this truck on the road is 0.5 + 5.7 = 6.2. Now you have 112 trucks in your count. Find out the damaging effect of each truck and then overall VDF will be total damaging effect divided by 112. I hope it is clear now.
Sir, if axle load survey load is given in Kg then Can we take Standard load in Kg and find EALF ! As , some standard loads are not specified in KG that's why .
Many calculations are not shown in this table. There are a total of 109 data and this is the sum of all 109 values in the last column. That is why it is finally divided by 109 to get the average VDF.
@@SatishIITR are there any free to download softwares other than excel to calculate and tabulate the field data directly for axle load survey and traffic survey?
Good Morning Sir. As per my knowledge MoRTH has increased Standard Axle Load to 75KN for single axle for single wheel on either side 115KN for single axle having dual wheel on either side some two years back.correct me if I am wrong . with deep regards
VDF equation is same. You need to take standard axle load accordingly. For example, for a single axle with dual wheel on either side, the standard axle load is 80 kN. Similarly, for tandem axle with dual wheel on either side it is 148 kN. You need to calculate VDF for each axle, whatever be the number of axles.
Please note that as per IRC-37, for single carriageway (undivided), the pavement should be designed for traffic estimated based on larger of two VDF values obtained for the two directions of traffic. Please ignore the statement in my video that average of the two VDF values should be taken for undivided carriageway. sorry for this miss.
OK sir..
CZcams students are blessed to learn from you … a living legend for traffic engineering.
Thankyou for the valuable efforts given by you.
Thank you so much. Please share the link with as many students as possible for more dissemination. This is the only motive behind starting this channel.
Thanks for your valuable information regarding VDF. It gave me very clear concept.
@@MukeshKumar-qb8jt Thanks Mukesh Ji, Please share the link with others also.
Excellent & Informative !! The Concept of VDF has been explained in very easy language/manner.
Thanks Neeraj Ji, Keep watching
Unbeliveable Explanation sir ,,.......No more words From my heart sir ......TQQQQQ SIR
Thanks. Keep watching
Sir.. please share your mail id...!! I can send mail to you...!! So that I can get a number from you sir
Thank you, sir. The discussion is very much helpful to me.
Glad to hear that. Keep watching.
Thank you Sir for this informative video. The origin of the factor 4 in VDF equations is very well covered.
You are welcome. There are many more to watch. Thanks
Thank you so much sir, for the valuable content.
Thanks, Keep watching other videos also.
This tutorial is indeed helpful. We are looking forward for more videos Sir.
Thanks. Please circulate the link in your groups. Watch other videos also. you will find them also very informative.
So nicely explained with example. Thank you sir
Thanks and welcome
Thank you Sir you have given the exact foundation of VDF and 4th Power Law, please make this type of videos relentlessly 🙏😊
There are many. see the playlist and watch videos of your interest. You can suggest any new topic also
@@SatishIITR Sure Sir
Thank You so much sir , Very nicely explained and too much useful
Thanks Achal for your appreciation. Please share the link with your friends also.
There are many more videos to watch.
Thank you so much Sir. Very clear concept.
Thanks. Please circulate the link in your groups.
sir, thanks for giving brilliant concept on Vdf. please make video on traffic growth rate estimation.
Sure, noted.
thankyou sir great video
Thanks, keep watching
Thank you very much sir !
Happy to note that you liked it. Please circulate the link in your groups also.
Nice vedio
Thanks. keep watching and share with others
Expecting more videos on Traffic Engineering 😊
There are many. see the playlist. Suggest any other topic.
Sir , well explained!
Thanks for liking
Great
Thanks.
Sir , nice and short explanation
Thanks and welcome. Keep watching
Importance of Resilient Modulus in pavement design will be useful
There is another video on Resilient Modulus, You may like to watch
Thank you
Keep watching
Thank you, Sir. Very well explained a critical topic. Regards
So nice of you. Please circulate the link in your groups also.
@@SatishIITR sure Sir
thank u sir
Welcome, Keep watching
Have been following you since you started the channel.
Sir can you collaborate with other professionals and provide video tutorials of different software packages used in transportation engineering.
Noted
A bus has two axles. front axle with single wheel on either side and rear axle with dual wheels on either side. shall we calculate and add the VDF(front)+VDF(rear)=VDF(effective) for each vehicle?
Yes
First of all thank you for your video which has a great help in pavement design as well as for road infrastructure management and maintenance. And currently, I am working on road user’s fee revenue generation. The vehicles are going to pay for the road maintenance as per their damaging effect on the road infrastructure from Bajaj to Sino Truck. Do you think it is appropriate to propitiating the payment ratio based on their damaging effect factor is right?
Yes, that will certainly discourage the overloading on pavements.
Thank for the video
Sir May I know how to calculate VDF for multi axle vehicles, articulated and semi articulated vehicles
The basic philosophy is same. Axle load divided by the standard load and then raise to the power 4. Take weight of each axle and calculate VDF as suggested in this video.
sir can you explain about spacing between front tyre to rear ( grater than 4.5 and or less than 4.5) why we note this in the field and where it used.
This information is required in the design of rigid pavement. How? Watch my video on design of rigid pavements.
@@SatishIITR thank you sir
why IRC has provided the vehicle damage factor value high for Rolling &plain as compare to hilly area?
The extent of overloading is very high in plain and rolling terrain. It is not much in hills due to steep gradient and safety reasons.
In case of tandem axle...which wheel load should be considered? Like 2no axle load 400kg 3no axle load 500kg then which wheel load should be considered for calculation?
Tandem axle has two axles only. Take the total weight on both of these axles.
Sir nicely covered the topic. However now adays the vehicles have single axle with single wheel at back. How to treat such vehicles for vdf?. They are not completely tandem or tridem with dual wheel set. Pls elaborate on this.
For single wheel on axle, the standard load limit is 6000 kg.
Sir, I have doubt, as we convert all commercial axle to standard axle like single axle to standard single, tandem axle load to standard tandem axle load, but after we get standard axle load for different different axle, then how we can sum their VDF
And assume we have VDF about 2 per vehicle, but here for 2 which axle is considered for design, single axle, tandem axle, or tridem?
I did not understand your point well, but let me try to explain. Each axle will cause some damage to the road.
Take a three axle truck, for example, the VDF of its front axle is 0.5 (say) and that of the rear axle is 5.7. So the damaging effect of this truck on the road is 0.5 + 5.7 = 6.2. Now you have 112 trucks in your count. Find out the damaging effect of each truck and then overall VDF will be total damaging effect divided by 112.
I hope it is clear now.
Sir, I have gross weight of Tridem Axle Vehicle from weigh bridge data. Plz suggest how to calculate VDF with this data.
The standard axle load for a Tridem axle is 224 kN. Use this value in the fourth power law to get the VDF
Sir, if axle load survey load is given in Kg then Can we take Standard load in Kg and find EALF !
As , some standard loads are not specified in KG that's why .
Yes, the VDF is a dimensionless parameter. Therefore units of load in denominator and numerator must be the same, kN or Kg.
Namaste, I am Subhash from Kathmandu, Nepal. 13:46 In one of your slides, where you calculate the total damaging effect of bus how is the total 103.2?
Many calculations are not shown in this table. There are a total of 109 data and this is the sum of all 109 values in the last column. That is why it is finally divided by 109 to get the average VDF.
@@SatishIITR thank you.
@@SatishIITR are there any free to download softwares other than excel to calculate and tabulate the field data directly for axle load survey and traffic survey?
thank you for replying promptly.
Good Morning Sir. As per my knowledge MoRTH has increased Standard Axle Load to 75KN for single axle for single wheel on either side 115KN for single axle having dual wheel on either side some two years back.correct me if I am wrong .
with deep regards
they have raised legal load limits and not the standard axle load.
@@SatishIITR right sir.
Sir can you please provide some explanation on lane distribution factor
This is explained in my another video on Deign of Flexible Pavement. Please watch
Sir how to calculate vdf for multi axle vehicle
VDF equation is same. You need to take standard axle load accordingly. For example, for a single axle with dual wheel on either side, the standard axle load is 80 kN. Similarly, for tandem axle with dual wheel on either side it is 148 kN. You need to calculate VDF for each axle, whatever be the number of axles.
@@SatishIITR thank you sir
GOOD EVENING SIR ......
IS THERE ANY MINIMUM AND MAXIMUM VALUE OF VDF VALUE SIR ??????
No, IRC 37 gives some indicative values but those should be used only for small projects
@@SatishIITR
TQQQ SIR ....
sir , could you please share the pdf file
PDF of what?
@@SatishIITR PDF of your lecture
@@SatishIITR sir , if possible could you please share the axle load survey sheet
@@souviksaha6408 I do not have Axle Load Survey sheet. This is a simple table which can be prepared at site also.
@@SatishIITR okay sir