Department of Public Works and Highways
AVERAGE INTERNATIONAL ROUGHNESS INDEX (IRI) PER REGION
As of 05 March 2016
     
Table 1.3a
       
  REGION TOTAL  
  CAR 6.88  
  NCR 4.69  
  NIR 4.93  
   I 4.10  
   II 4.88  
   III 3.92  
   IV-A 4.11  
   IV-B 5.30  
   V 4.22  
   VI 5.22  
   VII 4.23  
   VIII 3.48  
   IX 4.16  
   X 4.90  
   XI 4.23  
   XII 4.36  
   XIII 4.94  
  Nationwide Average 4.62  
       
  Note:     
     
  Segments of the roads with an average IRI of 1-3   
  are in “good” condition,  >3-5 in “fair” condition, >5-7 in   
  “poor” condition and >  7 in“bad” condition.  


 

 

Notes:
 

1.) Road data provided are as of  25 November 2015.

2.) The unit of measure for Road Data is kilometers.

3.) No Assessment refers to Road Sections that are either under construction and/or segments with length below the 50-meter gauging length.

4.) National Roads are classified into:

        Primary Roads - roads that connect cities of > 100,000 population.   

        Secondary Roads - other roads which complement with the national arterial roads to provide access to main population and production centers of the country.  

        Tertiary Roads - other existing roads under DPWH which perform a local function. (In the map, these roads are represented only by letters.)

 

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Last updated: 10/25/08.

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