Bus Timetable Optimization

Bus Timetable Optimization problems involve determining the minimum number of buses needed to maintain a given frequency (headway) on a bus route, considering round trip time.

10Worksheets
200+Practice Questions
IntermediateDifficulty
2-3 hoursHours to Master

Introduction to Bus Timetable Optimization

Bus Timetable Optimization problems involve determining the minimum number of buses needed to maintain a given frequency (headway) on a bus route, considering round trip time.

Prerequisites

Round trip time Headway calculation Frequency concepts Ceiling division
Why This Matters: Bus Timetable problems appear in 1-2 questions in Railways RRB and Banking exams. They test frequency and capacity planning.

How to Solve Bus Timetable Optimization Problems

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Step 1: Calculate round trip time (RTT) = 2 × one-way time

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Step 2: Identify required headway (H) between buses

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Step 3: Minimum buses = ceil(RTT / H)

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Step 4: Answer with number of buses

Pro Strategy: Buses needed = round_trip_time ÷ headway (rounded up). Each bus completes one round trip in RTT, so RTT/H buses needed for that frequency.

Example Problem

Example: Bus route takes 45 minutes one-way. Desired headway is 15 minutes. Minimum buses? Solution: Step 1: RTT = 45 × 2 = 90 minutes Step 2: H = 15 minutes Step 3: Buses = ceil(90/15) = 6 Answer: 6 buses

Pro Tips & Tricks

  • Headway = time between consecutive buses
  • Frequency = 1/headway (buses per unit time)
  • If RTT exactly divisible by H, buses = RTT/H
  • Otherwise, need one extra bus
  • One-way time × 2 = round trip time

Shortcut Methods to Solve Faster

Buses = (RTT + H - 1) // H
For 30 min headway on 60 min route: 2 buses
For 20 min headway on 50 min route: ceil(100/20)=5 buses

Common Mistakes to Avoid

Using one-way time instead of round trip time
Using floor instead of ceiling
Forgetting that buses need to be dispatched from both ends for bidirectional routes
Not accounting for peak vs off-peak frequencies

Exam Importance

Bus Timetable Optimization is an important topic for various competitive exams. Here's how frequently it appears:

SSC CGL
1-2 questions
BANKING PO
1-2 questions
RAILWAYS RRB
2-3 questions
INSURANCE
1-2 questions

Ready to Master Bus Timetable Optimization?

Start with Worksheet 1 and work your way up to expert level! Each worksheet includes:

20 practice questions
Detailed solutions
Step-by-step explanations
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