Survey focus: moving people without the cost
Ākonga analyse transport options at city scale and identify who gains and who is left out by each one.
- Applied Survey move: System analysis with a named equity consequence
- Evidence it produces: A transport judgement that states who it disadvantages
Lesson at a Glance | He Tirohanga Whakamua
Ngā Whāinga Ako | Learning Intentions
Students will know
- The approximate CO₂ emissions per passenger-kilometre for five transport modes: private petrol car (~150 g), bus (~50–80 g), train (~10–40 g depending on grid), e-scooter (~15–35 g including manufacturing), cycling (~6 g including food calories).
- That micro-mobility (e-scooters, e-bikes) has a significantly better operational CO₂ profile than private cars, but that early shared e-scooter schemes had very short operational lifespans (1–3 months) that made their LCA worse than walking.
- Why NZ cities have lower public transport mode share than comparable European cities — density, investment history, parking policy, and sprawl are structural rather than personal failures.
- That transport access is unequally distributed: low-income households, people with disabilities, people in suburban and rural areas, and young people without driver licences face structural transport poverty that sustainable transport solutions often fail to address.
Students will demonstrate
- By comparing five transport modes across three criteria (CO₂ per km, infrastructure requirement, community access) and identifying which performs best on each criterion.
- By designing one specific transport intervention for their own city — naming the trip it targets, the modal shift it would enable, and the structural barrier it addresses.
- By writing Design Journal Entry 16: a 3–4 sentence argument about why transport sustainability and transport justice must be solved together — and what is missing from a solution that addresses only one.
Do Now | Tīmatanga Whakaaro (7 min)
Display on the board — 2 minutes individual, 5 minutes class discussion:
"How do you usually get to school? Estimate: what is that trip's carbon footprint per kilometre — in grams of CO₂?"
Most students will not know. Take guesses on the board. Then reveal: a petrol car with one passenger is typically 140–180 g CO₂/km. A half-full bus is 50–80 g. An e-bike or e-scooter on NZ's grid is 15–35 g. A bicycle is 5–8 g (counting food energy). Walking is 2–4 g. Most students will be surprised the car is so much higher than alternatives — and will start asking why more people don't use alternatives.
Teacher note: NZ transport is particularly important here — close to a fifth of NZ's gross greenhouse gas emissions come from transport, predominantly private petrol cars — check the current figure in the Ministry for the Environment's latest greenhouse gas inventory. NZ's transport emissions per person are high by developed-country standards, and are a key barrier to meeting our climate commitments. The question "why do people drive?" is not moral — it is a design and infrastructure question.
Transport Mode Comparison | Ngā Ara Haerenga (15 min)
Transport is a system — each mode has an individual LCA, but it also shapes what other modes are possible. A city designed for cars is hard to retrofit for cycling. A city with dense public transport can support walking for the "last mile." System design locks in choices for decades.
🚗 Private Petrol Car
Highest per-passenger emissions, especially when single-occupancy. Requires extensive road, parking, and maintenance infrastructure. Flexible and convenient — this is why NZ defaulted to it. Embodies enormous amounts of steel, aluminium, plastic, and glass at manufacture. End-of-life recycling is partial.
Kaitiakitanga gap: Road infrastructure takes significant land, often through communities without consent. Traffic noise, air quality, and severance effects fall unevenly on low-income and Māori communities living near arterials.
🚌 Diesel Bus
Much better per-passenger when reasonably full. Uses existing road infrastructure. In NZ, fleets are transitioning to electric, and Auckland has been converting its buses for several years — look up how far Auckland Transport has actually got, and compare it to the target they set. The gap between a transport target and its delivery is itself worth discussing. The key variable is passenger load: a nearly empty bus can have a higher per-passenger footprint than a full car.
Access note: Bus networks serve low-income and carless households — they are often essential infrastructure, not a lifestyle choice. Underfunding bus services is a transport justice issue.
🚆 Electric Train
On NZ's predominantly renewable grid, electric rail is very low carbon per passenger. High capital cost and fixed routes mean it only works at density. Wellington's commuter rail is a genuine success; Auckland's new City Rail Link will significantly expand rail usefulness. Most NZ cities have no rail option.
NZ context: Rail infrastructure from the 1950s–70s was dismantled in many provincial cities. Re-establishing rail is politically and financially difficult — the locked-in-system problem in action.
🛴 Shared E-Scooter
Low operational emissions on NZ's grid. But early Lime scooters had operational lifespans of 1–3 months before damage and theft ended their useful life — making the manufacturing carbon cost enormous per km. Current generation scooters are designed to last 5+ years, dramatically improving LCA. Collection and overnight charging by van adds emissions.
Access gap: E-scooters require smartphone access, credit card, and physical dexterity. They serve young, able-bodied, smartphone-equipped users. They rarely serve people with disabilities, children, or the elderly.
🚲 Cycling
The lowest-carbon mechanised transport mode. A bicycle manufacturing carbon footprint is recovered after 10–30 km of replacing car trips. In NZ, cycling is constrained by lack of safe infrastructure, hills, rain, and distances. Cities with high cycling rates (Amsterdam, Copenhagen) built their infrastructure over decades — not as a reaction to climate but as a city design choice made in the 1970s.
NZ opportunity: Protected cycleways in Auckland, Wellington, and Christchurch show measurable modal shift when infrastructure is safe. Safety is the primary barrier, not distance or weather.
Micro-Mobility Deep Dive | Āta Titiro (10 min)
Are Lime scooters actually sustainable? The full LCA story.
When shared e-scooters first appeared in NZ cities (Christchurch 2018, then Auckland, Wellington), enthusiasts claimed they would transform urban mobility. The reality was more complicated — and more instructive.
- Operational carbon was very low on NZ's renewable grid
- They replaced short car trips in some cases
- They demonstrated demand for micro-mobility in NZ cities
- New scooter designs (5+ year lifespan) make the LCA genuinely competitive
- Early scooters lasted 1–3 months — manufacturing carbon spread over very few km
- Van collection for overnight charging added transport emissions
- They often replaced walking, not car trips — net negative for fitness, neutral for carbon
- Footpath clutter and crashes created community resistance
- Equity: required smartphone, credit card, able-bodied use
The LCA lesson: Operational efficiency is necessary but not sufficient. Manufacturing carbon (which Lime initially ignored in its marketing), end-of-life (scooters went to landfill), and the actual trip-substitution question (is this replacing a car trip or a walk?) determine whether the innovation is genuinely sustainable. The newer Lime Gen4 and Segway scooters have addressed most of these issues — lifespan now 5–7 years, swappable batteries, modular repair. The product got better because the LCA critique was applied.
Activity: Transport Design Challenge | Hoahoatanga Waka (10 min)
Design One Intervention for Your City
Choose a real trip that you, a family member, or someone in your community regularly makes by car. Design one specific intervention that would make it feasible to make that trip sustainably. Work through the four questions:
Name the origin, destination, distance, time of day, and why it is currently made by car.
Why can't the person currently make this trip sustainably? Name the specific infrastructure, policy, or safety failure — not the personal choice.
Describe one specific change — a protected cycleway on one stretch, a bus frequency increase, a secure bike parking facility, a carpool app — that would make the sustainable option feasible.
Name one group for whom your intervention still doesn't work — children, people with disabilities, people without smartphones — and what would extend it to them.
📓 Design Journal — Entry 16: Sustainable Transport and Transport Justice
Write 3–4 sentences responding to this prompt:
"Sustainable transport solutions — cycling, e-scooters, public transit — tend to work best for people who are young, able-bodied, live in dense urban areas, and have smartphone access. For everyone else, the car remains the only viable option. Does this mean sustainable transport is also a justice problem? What would a solution look like that addressed both sustainability AND access?"
Your entry should name one specific group that current sustainable transport solutions fail to serve, and propose one specific change that would serve them. It should state whether you think sustainability and justice can be achieved together, or whether there is a genuine trade-off.
Exit Claim | Whakamutunga (4 min)
On a slip of paper (anonymous, collected at the door):
"The biggest barrier to sustainable transport in my community is ______, because ______."
Teacher use: Sort slips by barrier type: infrastructure (no cycleways, no bus), safety (unsafe roads), cost (can't afford fares or e-scooter credit), distance (too far for active modes), or access (disability, no smartphone). If most students name infrastructure rather than personal choice, the structural framing has landed. If students name personal choice ("people are lazy"), return to the data: cities with good infrastructure have high sustainable transport rates regardless of culture.
Kaiako Planning | Ngā Tūāhu Whakaaro
📋 Curriculum Alignment
This lesson addresses the NZ Curriculum Technology strand: Technological Knowledge — Technological Systems at the urban scale. Students analyse how transport systems function as interdependent components — road, vehicle, user, regulation, land use — and how design decisions at any level affect the whole system. Social Sciences connections: Social Studies — understanding how urban systems create and distribute opportunity; Sustainability — technology transition at system scale.
📦 Materials & Resources
- Google Maps or a printed map of your city — for the transport design challenge, students need to identify a real trip on a real route
- Paper slips for exit claims
- Optional: NZTA cycling and walking infrastructure investment data (available at nzta.govt.nz) for Auckland/Wellington/Christchurch comparisons
Teacher-sourced video suggestion: Search for a documentary or news feature on cycling infrastructure in NZ, or the history of Amsterdam or Copenhagen's cycling transformation. Both Dutch and Danish cities deliberately chose cycling over cars in the 1970s following the oil crisis — the infrastructure decision was political, not cultural. This is the clearest evidence that infrastructure, not character, determines transport behaviour.
🔄 Differentiation
For students who need more support: Provide a pre-selected trip (school to local shops, home to sports ground) and ask students to complete the four design challenge questions for that specific trip rather than finding their own.
For students who move faster: Research the NZ government's "Let's Get Wellington Moving" or Auckland's "City Rail Link" project — what delays, cost overruns, and political controversies accompanied the infrastructure decision? What does this tell us about the barriers to transport system change beyond the technical?
For students in rural or provincial settings: The lesson's examples skew urban. Adapt by discussing rural transport poverty — what sustainable options exist for someone who lives 30 km from the nearest town with no bus service? This is a genuine design gap: most sustainable transport innovation has been urban-focused. Is there a rural micro-mobility solution that would work?
⏭️ Next Lesson Connection
Lesson 17 (Water Technology: Rainwater Harvesting and Greywater) shifts from transport systems to water systems — another fundamental urban infrastructure challenge. The pattern continues: systems designed for convenience and low upfront cost create long-term environmental costs and access inequalities. Students who are now comfortable with "what does the LCA say?" and "who does this serve?" are ready to apply those questions to water.