Key Transport System Indicators to Measure City Transit Performance

Cities run on movement. Every morning, millions of people in India step out to reach offices, schools, markets, and hospitals, and the way they travel shapes how livable a city actually is. But how do urban planners measure whether a city’s transport system is working well or quietly failing? They rely on a set of transport system indicators: measurable yardsticks that capture everything from how many people choose buses over cars to how safe a footpath feels at 8 PM. These indicators are the difference between guesswork and informed urban policy.

Why transport indicators matter for cities 🔗

Transport indicators are not just bureaucratic spreadsheets. They directly affect air quality, road safety, daily commute times, and even household budgets. The Ministry of Housing and Urban Affairs introduced Service Level Benchmarks for urban transport precisely because cities lacked a common language to compare performance. Without standardized indicators, one city might claim its bus network is “excellent” while another calls a similar system “inadequate”, with no real basis for either claim.

These benchmarks help city governments allocate budgets, decide where to lay new metro lines, and identify which neighbourhoods need better footpaths. They also help citizens hold authorities accountable. When data shows that a city’s public transport modal share has dropped from 40% to 25% in a decade, the conversation shifts from opinion to evidence.

Public transit share 🔗

The public transit share, also called public transport modal share, measures the percentage of total trips in a city made using buses, metros, suburban trains, and other shared public modes. It is one of the most telling indicators of urban mobility health. A high share means fewer private vehicles on roads, less congestion, lower emissions, and better access for low-income households.

The reality in Indian cities is mixed. According to national urban transport policy guidelines, cities with populations of one million should aim for a public transit modal share of 40-45%, while cities of five million should target around 75%. However, Tier I and Tier II cities currently meet only about 33% of their travel needs through public transport, and Tier III cities manage just 4%. Bus modal shares vary dramatically too, from as low as 3% in Surat to 43% in Bangalore.

Why public transit share is slipping 🔗

Several forces have pulled this indicator downwards. Rising household incomes have made two-wheelers and cars more accessible. Public bus services in many cities suffer from long waiting times, overcrowding, poor last-mile connectivity, and unreliable schedules. The COVID-19 pandemic accelerated the shift from public transit to private modes as people worried about contagion in crowded buses and trains.

The consequences are visible. More private vehicles mean more congestion, longer commutes, and a heavier emissions load. Cities like Bengaluru, Hyderabad, and Pune have seen the average commute stretch beyond an hour each way for a significant share of workers, which directly affects productivity and family time.

Emission rates 🔗

The emission rate indicator tracks the amount of pollution generated by the urban transport system per unit of time, distance, or passenger. It is usually measured in grams of carbon dioxide per passenger-kilometre, or as concentrations of pollutants like PM2.5, nitrogen oxides, and carbon monoxide near major roads. Emission rates connect transport choices to public health outcomes and climate commitments in a very direct way.

The transport sector is the third-largest source of energy-related CO2 emissions in India, with road transport alone accounting for around 12% of these emissions. Road transport is also responsible for 20-30% of urban air pollution. Of the 50 most polluted cities in the world, 35 are in India, and vehicle exhaust is a major contributor in many of them.

Why per-hour and per-passenger metrics matter 🔗

Tracking pollution per hour during peak traffic helps planners understand exposure risk for residents living near busy corridors. Per-passenger emissions, on the other hand, reveal which modes are environmentally efficient. A bus carrying 40 passengers emits far less CO2 per person than 40 individual cars covering the same distance. The Council on Energy, Environment and Water reports that direct tailpipe emissions from India’s transport sector reached 272 million tonnes of CO2 in 2020, with road transport responsible for more than 92% of this figure.

India has responded with Bharat Stage VI emission norms, electric vehicle incentives under the FAME scheme, and stricter fuel quality standards. But indicators show that without a parallel push to expand public transport and non-motorized travel, technological fixes alone will not be enough to bring emissions down to the levels needed for the country’s net-zero-by-2070 commitment.

Non-motorized travel index 🔗

The non-motorized travel index, often shortened to NMT index, measures how friendly a city is to people who walk and cycle. It looks at factors like the presence and condition of footpaths, dedicated cycle lanes, pedestrian crossings, signage, lighting, shade, and the share of trips made on foot or by bicycle. A higher NMT index means a city values its most vulnerable road users.

This indicator matters because walking and cycling are zero-emission, low-cost, and health-promoting modes. They also serve as essential first-mile and last-mile links to public transport. A passenger who cannot walk safely from home to a bus stop may simply give up on the bus altogether and switch to a two-wheeler.

The Indian picture 🔗

In many Indian cities, non-motorized trips already make up a sizable share of daily travel, even though infrastructure rarely reflects this. Bhopal, for example, shows a modal share of 43% for walking and 4% for cycling, with public transport at 27%. Yet most of these walking and cycling trips happen on roads designed primarily for cars, with footpaths that are either missing, broken, or occupied by parked vehicles and vendors.

Research on active transportation indicators in Tier II Indian cities highlights that the built environment, supportive facilities, and safety are the most influential factors in encouraging people to shift to walking and cycling. Without these, the NMT index stays low even in cities where many people technically walk to work out of necessity rather than choice.

Walkability and cycle-ability 🔗

While the NMT index captures the broad picture, walkability and cycle-ability are more granular indicators that evaluate the actual physical infrastructure for non-motorized transport. They examine specific qualities of streets and neighbourhoods that make walking and cycling either pleasant or punishing.

What makes a street walkable 🔗

Walkability scores typically consider footpath width and continuity, the quality of the walking surface, presence of street lighting, availability of safe crossings, density of destinations within walking distance, and overall safety perception. A walkable street is one where a child, an elderly person, and someone with a disability can all move comfortably and safely.

In most Indian cities, footpaths exist on paper but vanish in practice. They are encroached upon by parked scooters, blocked by transformers and electrical boxes, or simply too narrow to accommodate two people side by side. Pedestrian deaths form a tragically large share of road fatalities, which is itself a damning walkability indicator.

Measuring cycle-ability 🔗

Cycle-ability evaluates whether a city offers dedicated and continuous cycle tracks, secure parking for bicycles, integration with public transport stations, and safety from motorized traffic. The Public Bicycle Sharing programmes piloted in Bhopal, Mysuru, and other Indian cities were partly designed to revive cycling as a respectable urban mobility option, especially since cycling had become socially stigmatised as a “poor man’s mode of transport” during decades of rapid motorization.

Cities that have invested in protected cycle lanes, such as parts of Pune and Chennai under their Smart City projects, have seen incremental improvements in cycling trips. But progress is uneven, and the absence of consistent cycle-ability data across cities makes it difficult to benchmark and learn from successful examples.

Putting the indicators together 🔗

These four indicators do not work in isolation. A city with a high public transit share usually also has a strong NMT index, because people who use buses and metros walk or cycle to reach stations. Cities with high walkability and cycle-ability tend to record lower per-capita emissions because residents take fewer motorized trips. When transport planners look at all four indicators together, they get a comprehensive picture of how sustainable and equitable a city’s mobility system is.

The flip side is also true. A city that performs poorly on one indicator usually struggles on others. Low public transit share pushes people towards private vehicles, which raises emissions and makes streets more hostile to walking and cycling, which in turn further reduces public transit share. Breaking this cycle requires coordinated action across all four dimensions.

The road ahead for Indian cities 🔗

India’s urban population is expected to nearly double by 2050. Without serious investment in public transit, electrification of buses, protected non-motorized infrastructure, and data-driven monitoring of these indicators, cities risk locking in decades of congestion and pollution. The good news is that frameworks like Service Level Benchmarks already exist. What is needed is consistent measurement, public reporting, and political willingness to act on what the numbers reveal.

Citizens also have a role. Asking for footpath audits in your neighbourhood, using public transport when feasible, and demanding cycle-friendly streets are small actions that, scaled up, change what cities measure and prioritise.

What do you think? If you had to grade your city on these four indicators, which one would score the lowest, and what single change would improve it the fastest? Would you give up your two-wheeler or car for a daily commute if your local public transport and footpaths were dramatically better?

References

1. https://www.mohua.gov.in/upload/uploadfiles/files/Service_level.pdf
2. https://www.orfonline.org/expert-speak/the-need-for-integrated-and-sustainable-multimodal-transport-systems-in-indian-cities
3. https://www.niti.gov.in/decarbonising-transport-redefining-mobility-policies-india
4. https://www.iea.org/reports/transitioning-indias-road-transport-sector/executive-summary
5. https://www.ceew.in/publications/india-transport-energy-use-carbon-emissions-and-decarbonisation
6. https://isocarp.org/app/uploads/2023/03/ISOCARP_2022_Hajela_ISO335.pdf
7. https://onlinelibrary.wiley.com/doi/full/10.1155/atr/2175645
8. https://www.wri.org/research/public-bicycle-sharing-india-lessons-learned-implementation-three-cities