How many kilometers of roads are constructed in India every year? | Guesstimates - Interview Preparation PDF Download

To solve this guesstimate, we can break down the problem into smaller steps and make some reasonable assumptions.
Here's a step-by-step approach to estimate the number of kilometers of roads constructed in India every year:

Step 1: Categorize the roads

Roads in India can be categorized into the following:

• National Highways (NH)
• State Highways (SH)
• Major District Roads (MDR)
• Other District Roads (ODR)
• Village Roads (VR)

Step 2: Estimate the road construction rate for each category

We'll make some assumptions about the average rate of road construction for each category.
(A) National Highways: Let's assume that construction of National Highways is around 10,000 km per year. This assumption is based on the government's focus on improving infrastructure and connectivity across the country.
(B) State Highways: State Highways are managed by state governments, and their construction rate might vary across states. Let's assume that the construction rate of State Highways is half of the National Highways rate, i.e., 5,000 km per year.
(C) Major District Roads: Major District Roads connect important cities and towns within a state. Let's assume that the construction rate for Major District Roads is double the State Highways rate, i.e., 10,000 km per year.
(D) Other District Roads: These roads connect smaller towns and cities within a state. Let's assume that the construction rate of Other District Roads is double the Major District Roads rate, i.e., 20,000 km per year.
(E) Village Roads: These roads connect villages and rural areas. The construction rate of Village Roads could be much higher than other categories due to the large number of villages in India. Let's assume that the construction rate for Village Roads is 50,000 km per year.

Step 3: Calculate the total road construction rate per year

Now, we'll add up the road construction rates of all the categories to get the total kilometers of roads constructed in India every year.
Total road construction rate = National Highways + State Highways + Major District Roads + Other District Roads + Village Roads
Total road construction rate = 10,000 km (NH) + 5,000 km (SH) + 10,000 km (MDR) + 20,000 km (ODR) + 50,000 km (VR)
Total road construction rate = 95,000 km per year

So, based on our assumptions, approximately 95,000 kilometers of roads are constructed in India every year. Keep in mind that this is a rough estimate and the actual numbers may vary.