Schedule mock interviews on the Meeting Board, join the latest community discussions in our Consulting Q&A and find like-minded Interview Partners to connect and practice with!
Back to overview

How many cars use the m25 motorway daily?

3
3.0k
18
Be the first to answer!
Nobody has responded to this question yet.
Top answer
Clara
Coach
on Jun 04, 2020
McKinsey | Awarded professor at Master in Management @ IE | MBA at MIT |+180 students coached | Integrated FIT Guide aut

Hello Sachin!

It´s the classical market sizing, and there are many ways to tackle it. 

PM me if you want, since one of my cases precisely is about the privatization of a highway, including a market sizing on the number of users. 

One of many options: 

  • Total population in London and surroundings
  • % of them who transit on a weekly basis
    • Working population
    • Weekend population
  • % of them who do so by using the motorway, splitting
    • Private cars and car sharing
    • Buses
    • Perhaps some trucks or commercial vehicles on top

Hope it helps! 

Cheers, 

Clara

Ian
Coach
on Jun 04, 2020
Top US BCG / MBB Coach - 5,000 sessions |Tech, Platinion, Big 4 | 9/9 personal interviews passed | 95% candidate success

Hi Sachin,

First, you need to be very careful with daily! Are we talking weekends, weekdays, or overall?

Estimation of those using m25 for work

  1. Population of london (and surrounding areas)
  2. % of commuting population
    1. % commuting during the week
    2. % commuting during weekend (service workers, etc.)
  3. % of commuting population not living in central london and not using public transport

​Estimation of those using m25 for leisure

  1. Population of london (and surrounding areas)
  2. Population segments (age and/or affluence)
    1. % in each group that own a car
    2. # of daily leisure uses for each group (note: You should definitely assume weekend #s are higher)
    3. % of trips that require m25 motorway

Then add the two together :)

Deleted user
on Jun 09, 2020

Hello, 

Completely agree with the proposed approaches but I could have started with a segmentation into 3 buckets

1) People who go to work or come back from work 

2) vacationers or people passing through (probably with a peak at Christmas and during summer vacation periods).

3) Road workers (trucks, salespeople, ...)

Best, 

David

0
Similar Questions
Consulting
Guesstimate question - number of airplanes in the sky
on Aug 23, 2024
Global
4
1.4k
Top answer by
Hagen
Coach
#1 recommended coach | >95% success rate | 8+ years consulting, 8+ years coaching and 7+ years interviewing experience
56
4 Answers
1.4k Views
+1
Consulting
Just did the Mckinsey Solve Game (January 2025) - got some questions/insights
on Apr 24, 2025
Global
5
3.3k
Top answer by
Hagen
Coach
#1 recommended coach | >95% success rate | 8+ years consulting, 8+ years coaching and 7+ years interviewing experience
38
5 Answers
3.3k Views
+2
Consulting
Employment Gap on Resume and How to talk about it during Interview
on Apr 14, 2025
Global
9
8.0k
Top answer by
Ariadna
Coach
BCG | Project Leader and Experienced Interviewer | MBA at London Business School
110
9 Answers
8.0k Views
+6
How likely are you to recommend us to a friend or fellow student?
0 = Not likely
10 = Very likely
Thanks for your feedback! Your opinion helps us make PrepLounge even better.