NSV Report letter

To

The Concessionaire,

Subject: Conduct a bi-annual roughness measurement test on the project highway—Reg

Dear sir,

With reference to the subject, it is to inform you that 

According to Clause 5.8 of the Manual of Specifications and Standards for Four Laning of Highways (IRC:SP:84), the pavement’s performance evolves over time. And, as scheduled in the concession agreement’s Schedule K, The procedures outlined in the maintenance manual and annual maintenance program are applicable.

The roughness measurement must be carried out using appropriate, approved methods. The matter has been pending for a month.

Therefore, we instruct you to conduct the roughness measurement test immediately.

Please treat this as urgent. 

Thank you while ensuring our best services.

[Yours,]

[Insert the name of the authorized person].

To

The Authority/IE/AE/PMC,

Subject: Planning and conducting a roughness survey using a Network Survey Vehicle—Reg.

Dear sir,

Apropos to the subject and the reference cited above. It is to inform you that we plan to use a Network Survey Vehicle (NSV) to conduct the roughness survey. on September XX, 2024.

The NSV is a special-purpose vehicle. That includes a digital laser profiler (DLP) for measuring pavement roughness. The ASTM E 950 Class-1 laser profilometer is a high-speed road roughness measuring system. It has more accurate roughness measurements. India has adopted the laser profilometer system as standard practice. Following its extensive use worldwide.

We would also like to draw your attention to Circular No. 11041/218/2007-Admn. This circular, dated November 3, 2009, Permits the use of laser profilometers for roughness measurement instead of bump integrators.

[Yours,]

To

The Authority/IE/AE/PMC,

Subject: Submission of NSV Report-Reg

Dear sir,

With reference to the above subject and references (1) and (2) above cited, We are now submitting the IRI and BI values using the Network Survey Vehicle (NSV).

[Yours,]

[Insert the name of the authorized person].

To

The Concessionaire,

Subject: Review Observations and Comments on the Submission of the NSV Report-Reg

Dear sir,

This concerns the submission of the NSV report. It is time that we review the submitted NSV report. The following are the observations on the same

About the submission of the network survey vehicle report

• Lack of clarity in the submission of the network survey vehicle report
• We checked accuracy at various points along the survey route.
• All parameters were translated from field observations into measurable quantities.The NSV report links the correlation patterns of implemented devices to the output.

Review of Observations and Comments on the NSV Report Submission

1. The NSV report document is enumerated. 
2. The workflow sequence is exclusive to the quality assurance program.
3. The NSV Report submission is concerned with the transference of the following All of the parameters captured from ground observations.
4. The report fails to take into account the correlations and considerations between these parameters. 
5. They influence the derivation of IR values, both individually and in combination.
6. The NSV Report submission remains silent about the derivation of the customization factor, which transforms IR into a roughness index.
7. The same thing must be elaborated on by mentioning the influence of ground parameters. 
8. Each parameter’s deduction is outlined in detail. quantified contribution of the conversion factor’s arrival.
9. The essence and relevance of the applicable quantification weights depend on the contributions of all relevant parameters.
10. To arrive at the conversion factor, we will need to elaborate. We should use the customized factor, not the available one. The calculations for roughness arrival will use the conditions and terms provided.

Conclusion 

The NSV Report submission must present all the lengths with comprehensive chainages that rectification can answer. This applies to all lane kilometers where the roughness index exceeds 2750 mm/KM. To tabulate the cumulative length, lane-wise. Also, present the remarks column in the NSV report. And detailing the carriageway’s condition during the test. 

Additionally, the report should highlight the following conditions: That is, it causes distress and contributes to the overshoot of the roughness index at specific locations. 

[Yours,]

[Insert the name of the authorized person].