Building on the substantial evidence from our report, Ahead of the Kerb, which demonstrates the social, environmental and economic impacts of increasingly large SUVs, Transform’s Emilia Lauder takes an in-depth look at the underexplored arguments – both for and against – SUV use.
Twenty years ago, today’s average family SUV would have looked enormous. Today, it’s commonplace to see streets lined with them, and very little space to navigate safely around them or find space to park alongside them. In recent decades, cars haven’t just become cleaner; they’ve become larger, taller and heavier, changing how our streets look and feel, how pedestrians use them and even how we park.
Our report, Ahead of the Kerb, published in April 2026, examines the growing impact of larger vehicles on Scotland’s towns and cities. Rather than focusing solely on emissions, the report explores how SUVs and other oversized vehicles affect road safety, parking availability, public space and costs faced by local authorities. Our extensive research and reports demonstrate that while larger vehicles can meet legitimate needs for some drivers, their growing popularity is impeding infrastructure and road safety.
When we published Ahead of the Kerb, our report ignited debate online, in which a wide range of opinions were shared regarding SUVs and the consequences for road safety and public space. However, the immediate reaction online suggested that this issue was considerably deeper than an SUV debate, reflecting people’s transport insecurities and overreliance on cars. Analysis of these arguments proves essential in understanding how Scotland can adapt transport policy to address road safety and encourage people to have greater transport choice and accessibility of their streets.
Sparking online debate
In response to our report launch, a Reddit thread emerged, and with it came hundreds of comments and discussions. From SUV users to avid cyclists to particulate-matter experts, the online discussion offered a revealing snapshot of how ordinary people understand the rise of SUVs and why attempts to regulate them have become so politically contentious.
The discussion repeatedly shifted away from SUVs as a vehicle type towards a broader perspective of vehicle size inflation. Many participants argued that manufacturers have gradually increased the dimensions of almost every class of vehicle, making genuinely small cars increasingly difficult to purchase:
“Even if you try to go for a smaller car, the ‘smaller’ cars are getting too big as well“
The mention of vehicle size was a central topic for debate, suggesting that size inflation is already igniting concerns over reduced space for people to park, walk, and cycle.
Another recurring concern centred on streets and public space. One council worker described roads that had become “effectively single-track” because modern vehicles are larger than they were fifteen years ago:
“There are streets where I work, that are now effectively single-track roads, because of the larger size of modern vehicles, compared to 15yrs ago”
This mirrors the central findings of Ahead of the Kerb and the core message of our fundraising campaign, Ending Big Car Bloat, through which we aimed to raise awareness and build local authority backing for measures targeting the issues of vehicle size, weight and consequences for road safety and climate targets. Larger vehicles dominate road space, creating scarcity and affecting parking, visibility and the operation of city streets. Reflected in comments on the Reddit forum, there is a clear appetite for traffic reduction, for drivers and pedestrians alike.
Tax debate
“I’ve been saying for a while there’s no need for the plug in vehicle tax, just impose a weight tax based on the specs on a V5 like how VED used to work with emissions. Under 1000kg and you don’t pay anything, otherwise you’re paying for something proportional to the damage your vehicle will do to roads.”
The most common objection relayed was that campaigners were proposing yet another tax. Many commenters questioned whether large vehicles deserve to face additional charges at all. Several pointed out that bigger or more expensive cars already attract higher Vehicle Excise Duty, the Expensive Car Supplement for vehicles costing over £40,000, and argued that future road pricing or pay-per-mile charging could make further taxes unnecessary. Others viewed proposals for parking surcharges or size-based charging as another example of the government placing financial burdens on motorists.
This is not the only issue raised by motorists. If drivers already contribute through fuel duty, taxes and insurance, why should owners of larger vehicles pay again? For many, the issue is not whether SUVs create problems, but whether introducing another charge represents double taxation, or sets a precedent for even more government intervention.
However, this criticism also highlights an important distinction, too often overlooked. Existing vehicle taxes are primarily designed around factors such as emissions, fuel type and purchase price. They do not directly account for the amount of public space a vehicle occupies once unleashed on a city street. A large SUV driven only occasionally may still take up more space, obstruct visibility at junctions and crossings, and make narrow streets more difficult to navigate every day it is parked. Those are different impacts from the environmental costs captured by existing taxation.
Fairness debate
Some Reddit users suggested that a pay-per-mile system would be a fairer measure, arguing that those who use the roads most should contribute the most.
“Do a pay-per-mile model, that way the people using the roads more get taxed.”
This approach has clear advantages for tackling congestion and road use, but it addresses a different policy problem. Distance travelled measures how intensively a vehicle uses the road network, whereas current proposals are linked to vehicle occupancy, even when stationary. As several responses acknowledged, a vehicle can drive relatively few miles while still dominating parking space or reducing visibility on residential streets.
This is a practical challenge for policymakers, who must decide which issues transport policy should seek to address, and whether the growing demands that larger vehicles place on shared urban space are adequately reflected in the rules that govern them.
Who gets to use the space?
Looking across the online discussion, one thing becomes clear: the debate no longer centres merely on SUVs. Many users cited transport insecurity and road safety anxieties as central concerns. From this debate, we can see the impact of Scotland’s competing demands on increasingly limited road space. While some people see larger private vehicles primarily as a matter of personal choice, others see them as posing safety risks that affect everyone who uses shared streets, pavements and public parking.
Many contributors accepted that larger vehicles can be essential for some disabled drivers, rural communities, tradespeople and families. The real disagreement lies in whether policy should distinguish between vehicles that meet genuine practical needs and those that have become a superfluous personal choice.
Personal choice at public cost
Whether or not Scotland ultimately introduces size-based parking charges or other restrictions, we can see how the era of treating vehicle size as personal preference is beginning to be questioned. As cars continue to expand in production and size, so too do the demands they place on shared spaces and the public realm.
The discussion indicates that concerns about vehicle size extend beyond environmental campaigners. Comments about streets becoming effectively single-track, shrinking parking space and difficulties walking and cycling point to a shared concern over how limited road space is allocated. For policymakers, this distinction matters. Measures addressing larger vehicles can be framed not simply as restrictions on motorists, but as a means of making streets safer and more accessible for everyone who uses them.
The opposition expressed online is equally significant. Repeated concerns about “another tax” suggest that introducing new charges without clearly explaining the additional costs associated with vehicle size risks reinforcing perceptions that transport policy unfairly targets drivers. This strengthens our case from Ahead of the Kerb for the Scottish Government to equip local authorities with evidence explaining how larger vehicles affect public space, safety, health, equity and public finances.
This matters if Scotland is to achieve its ambitions to give people greater transport choice. Walking, wheeling and cycling become less attractive when people feel that streets are difficult or unsafe to navigate, while buses and other road users must operate within the same constrained space. Managing the size and number of the largest vehicles in urban areas should therefore be considered alongside policies designed to encourage modal shift.
This is particularly relevant to our recommendation that the Scottish Government explore the feasibility of restricting unnecessary SUV use in city centres. Such a measure would not simply concern which cars people are allowed to own. Its wider purpose would be to determine how scarce urban road space can be allocated in ways that improve safety and enable more people to walk, wheel, cycle and use public transport.
Overall, the public response shows both the case for reform and the difficulty of delivering it. Where our report, Ahead of the Kerb, reveals why reform may be necessary, the arguments from the public show where policy and campaigning may encounter social resistance- a tension policymakers must address to make that reform publicly acceptable.
