London saw a surprising benefit to ultra-low emissions zone: More active kids

Mechanism behind “more active kids”

• Many commenters think kids didn’t “sense” cleaner air; instead parents stopped driving because polluting trips became more expensive.
• Other possible mechanisms mentioned: fewer cars around schools, making walking feel safer; overlapping policies like Low Traffic Neighbourhoods (LTNs), not just ULEZ.

Traffic, emissions, and mode shift

• Some locals report little noticeable change in overall traffic volumes; others say school-run congestion is still bad or worse.
• Official stats cited: London vehicle miles fell slightly; ULEZ targets the dirtiest 4–20% of vehicles, not most trips.
• Several note London’s ULEZ now covers almost the whole city; it mainly changes which cars are driven, not whether people drive at all.

Equity and “tax on the poor”

• One camp calls ULEZ a regressive “tax on being poor,” especially for outer-London workers, tradespeople, and legacy diesel owners now facing detours or charges.
• Opposing view:
  • The very poorest Londoners generally don’t own cars and benefit from cleaner air and safer streets.
  • Compliant used cars are described as cheap, with a scrappage scheme often paying more than non-compliant cars are worth.
  • Pollution is seen as a negative externality that should be priced regardless of income, possibly with better-targeted compensation.

London poverty, housing, and who drives

• Long sub-thread debates whether “the poor don’t live in central London.”
• Evidence cited: extensive social housing estates even in central boroughs; about 40% of inner-Londoners in social housing; many “too average” earners priced out.
• Car ownership is uneven: central zones skew car-light; outer zones and beyond the M25 often have 2+ cars per household because public transport is unreliable or expensive.

Urban design, cycling, and child independence

• Many argue emissions policy alone is secondary; road design, car-free streets, and Dutch-style cycling infrastructure are key to kids safely walking/biking.
• Comparisons made to the Netherlands, Sweden, and US cities; tension noted between vulnerable road users’ safety and driver responsibility.

Air quality and study/article criticism

• Several Londoners report noticeably cleaner air and fewer “black snot” experiences than decades ago.
• One detailed critique of the cited study argues the headline exaggerates effects:
  • Baseline: ~85% of London kids already used “active” travel.
  • Net modal shift is tiny; the “four in ten” refers only to the small subset previously driven, and even there transitions go both ways.
  • Overall, London mostly avoided the drift away from active travel seen in the Luton control, rather than experiencing a dramatic shift.