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A Yorkshire‑based service business operating 134 vans across Bradford, Sheffield, Leeds and the wider M62 corridor was facing rising Clean Air Zone (CAZ) and ULEZ costs. Like many regional fleets, the charges weren’timmediately visible - they were spread across multiple depots, cost centres, and driver expense claims.
When the business reviewed its actual CAZ exposure, the numbers were far higher than expected.
Within one year, they reduced their CAZ‑related costs by 40%, saving £28,000 in year one alone.
The Challenge
The fleet operated a mix of Euro 5 and Euro 6 vans, with regular routes into:
- Bradford’s Class C CAZ
- Sheffield’s Class C CAZ
- Manchester’s ULEZ
- Leeds city centre (non‑charging zone but monitored for compliance)
The business was experiencing:
- Repeat PCNs from the same vehicles entering Bradford
- Daily charges for vans entering Sheffield’s inner ring road
- Unplanned route deviations that triggered CAZ charges
- Admin overload managing penalties and compliance checks
A review of their financial data showed they were spending £5,800+ per month on CAZ and ULEZ charges - most of it unnoticed.
What We Found
A detailed fleet audit uncovered several hidden cost drivers:
1. 17 vans were repeatedly triggering PCNs in Bradford
Bradford issued 315,900 PCNs between Sept 2022 and Feb 2025, and this fleet accounted for a disproportionate number of repeat penalties.
2. Six vehicles were responsible for 48% of total CAZ spend
These older vans were entering Bradford and Sheffield multiple times per week.
3. Two regular delivery routes passed through Sheffield’s inner ring road unnecessarily
Each entry cost £10 per van, adding up to thousands per year.
4. Compliance checks were inconsistent
Drivers were unaware of which zones were chargeable and when.
The Solution
The fleet implemented a targeted, minimal‑disruption plan:
- Replaced six high‑cost vans with compliant models
- Re‑routed two delivery runs to avoid Sheffield’s charging zone
- Introduced a simple pre‑route compliance check
- Set up monthly CAZ reporting to track exposure
No major fleet overhaul. No large‑scale vehicle replacement programme. Just focused, data‑led changes.
The Results (12 Months)
40% reduction in CAZ and ULEZ costs, from £5,800+ per month to under £3,500.
£28,000 saved in year one, directly attributable to vehicle changes and route optimisation.
30% reduction in admin time, fewer PCNs, fewer disputes, fewer manual checks.
Zero repeat PCNs, after the compliance process was introduced.
Why It Worked
This fleet’s success came from:
- Understanding their actual CAZ exposure
- Identifying the small number of vehicles causing most of the cost
- Making targeted upgrades, not wholesale replacements
- Using local CAZ data to guide decisions
It’s a model that works for many Yorkshire fleets - especially those operating across Bradford, Sheffield, Leeds, Hull, Doncaster, and the M1/M62 corridor.