Concept:
Length of different types of road according to Lucknow Road Plan:
1. Length of NH (in km) = \(\frac{Area(Km^{2})}{50}\)
2. Length of SH (in km) =\(=\frac{Area(Km^{2})}{25}\)
or Length (in km) = 62.5 x Number of towns with population above \(5000\frac{Area(Km^{2})}{50}\)
3. Length of MDR (in km) \(=\frac{Area(Km^{2})}{12.5}\)
Length (in km) = 90 x Number of towns with a population above 5,000
4. Total road length (in km) =4.74 x Number of villages and town
5. Rural Road Length (in km) ⇒ This can be calculated by finding the total road length and subtracting the other categories.
Calculation:
Given, Area = 13,400 m^{2}
Length of NH (in km) = \(\frac{Area(Km^{2})}{50}\)
\(=\frac{13,400}{50}=268\ km\)
Important Points
Comparison of three road development plans of India in a tabular manner.
Topic 
1st Road Plan 
2nd Road Plan 
3rd Road Plan 
Venue 
Nagpur 
Bombay 
Lucknow 
Target (km/100 sq km) 
16 
32 
82 
Total road length (km) 
5.29 lakh

10.57 lakh

27.02 lakh

Important points 
Roads are divided into 5 categories

Apart from the 1st 5, an expressway was added 
Roads were divided into 3 major categories

Road pattern 
Star and grid 

Square and block 