About this previous year paper
TRANSPORTATION SYSTEM AND PLANNING (ECE023)
Section-wise Solved Answers & Notes
SECTION – A (10 × 2 = 20 Marks)
Very short, precise answers
(a) Measures to meet deteriorating traffic conditions in cities
• Improve public transport • Traffic signal coordination
• Road widening & flyovers • Parking management
• Promote non-motorized transport
(b) Traffic growth in cities
Traffic growth refers to the increase in number of vehicles and travel demand due to population growth, urbanization, rising income, and economic development.
(c) Role of transportation system in our life
Transportation system:
• Enables movement of people & goods • Supports economic growth
• Connects rural & urban areas • Improves social interaction
(d) Transportation planning (definition)
Transportation planning is the systematic process of evaluating, forecasting, and developing transport facilities to meet future travel demand efficiently.
(e) Effects of traffic on environment
• Air pollution • Noise pollution
• Fuel consumption • Climate change
• Health hazards
(f) Present scenario of road transport
Road transport dominates in India due to:
• Door-to-door service • Flexibility
• Increasing vehicle ownership • High congestion in cities
(g) Types of transportation system in India
• Roadways • Railways
• Waterways • Airways
• Pipelines
(h) Meaning of transportation planning
It is the process of planning transport infrastructure and services based on present and future travel needs.
(i) Why bicycle traffic should be promoted
• Eco-friendly • Reduces congestion
• Low cost • Improves public health
(j) Objectives of transportation planning
• Safe & efficient movement • Reduce travel time & cost
• Minimize environmental impact • Balanced regional development
SECTION – B (Attempt Any Five)
(5 × 10 = 50 Marks)
(a) Role of IPT in transportation system
IPT (Intermediate Public Transport) bridges the gap between private vehicles and mass transport.
Role & usefulness:
• Provides last-mile connectivity • Flexible routes & timings
• Affordable for short trips • Reduces dependence on private vehicles
Examples: Auto-rickshaws, e-rickshaws.
(b) Types of IPT vehicles in India
• Auto-rickshaws • Cycle-rickshaws
• E-rickshaws • Shared taxis
• Tempos
(c) Need for traffic forecasting & limitations
Need:
• Infrastructure planning • Capacity analysis
• Investment decisions • Policy formulation
Limitations:
• Data inaccuracy • Assumption-based models
• Changing travel behavior • Uncertain future growth
(d) Difficulties in transportation planning process
• Lack of reliable data • Financial constraints
• Land acquisition issues • Political interference
• Public opposition
(e) Characteristics of IPT modes
• Short-distance travel • Flexible routing
• Intermediate capacity • Lower operating cost
• High accessibility
(f) Traffic stream variables
(i) Space headway: Distance between two vehicles
(ii) Time headway: Time gap between vehicles
(iii) Time mean speed: Average speed over time
(iv) Flow: Number of vehicles per unit time
(v) Concentration: Number of vehicles per unit length
(g) Trip generation
Definition:
Trip generation estimates the number of trips produced and attracted by different zones.
Factors affecting trips: • Population
• Income • Land use
• Vehicle ownership • Employment
(h) Trip distribution
Definition: Trip distribution determines how trips produced are distributed among different zones.
Methods: • Growth factor method
• Gravity model • Opportunity model
SECTION – C (Attempt Any Two)
(2 × 15 = 30 Marks)
Q3. Purpose of Traffic Assignment & Techniques
Purpose of Traffic Assignment
• Assign trips to road network • Estimate traffic volume on links
• Identify congested routes • Evaluate network performance
Traffic assignment techniques
• All-or-nothing assignment – shortest path only • Incremental assignment – gradual loading
• Capacity-restraint assignment – considers congestion
• User equilibrium assignment – minimum travel time for users
Q4. Trip Interchange Problem (Numerical)
Given:
Trips produced (P) and attracted (A):
| Zone | Produced | Attracted |
|---|---|---|
| A | 2000 | 3000 |
| B | 3000 | 4000 |
| C | 4000 | 2000 |
Travel time between all zones = 20 min
Trips ∝ 1t2\frac{1}{t^2}t21 (same for all, hence cancels)
Given: Trips between B and C = 600
Step-1: Proportionality
Trip interchange depends only on production & attraction.
Let trips between zones be: AB = x, AC = y, BA = p, BC = 600, CA = q, CB = r
Step-2: Use production totals
For zone A: x+y=2000x + y = 2000x+y=2000
For zone B: p+600=3000⇒p=2400p + 600 = 3000 \Rightarrow p = 2400p+600=3000⇒p=2400
For zone C: q+r=4000q + r = 4000q+r=4000
Step-3: Use attraction totals
For zone A: p+q=3000⇒q=600p + q = 3000 \Rightarrow q = 600p+q=3000⇒q=600
For zone B:
x+r=4000x + r = 4000x+r=4000
For zone C: y+600=2000⇒y=1400y + 600 = 2000 \Rightarrow y = 1400y+600=2000⇒y=1400
Step-4: Final values From x+y=2000x + y = 2000x+y=2000:
x=600x = 600x=600
From x+r=4000x + r = 4000x+r=4000: r=3400r = 3400r=3400
Final Trip Interchanges
| From → To | Trips |
|---|---|
| A → B | 600 |
| A → C | 1400 |
| B → A | 2400 |
| B → C | 600 |
| C → A | 600 |
| C → B | 3400 |
Q5. Modal Split & Factors Affecting It
Modal Split
Modal split refers to the distribution of trips among different modes of transport such as car, bus, rail, bicycle, etc.
Factors affecting modal split
• Travel cost • Travel time
• Comfort & convenience • Income level
• Vehicle ownership • Availability of public transport
• Trip purpose