Bristol was one of many UK cities tasked with addressing its high levels of air pollution by the government in order to meet current standards. This presentation reflects on Bristol City Council’s approach to responding to this issue, the proposed scheme and other transport related provisions put in place. The main proposed solution put forward by the council is a CAZ D zone across the central are of Bristol, designed to reduce vehicle emissions by charging non-compliant vehicles to enter the zone area. The zone will operate 24/7 365 days a year and charges all vehicles both commercial such as buses, HGVs and vans, and private cars. The full business case is currently with JAQU for assessment and sign off and we are working closely with them to finalise the proposal. We expect the zone to become operational in the summer of 2021. Poor air quality affects all of us but is most prevalent in the centre of the city. Recognising this issue the council took action in 2020 as part of its response to the pandemic to significantly reduce the number of vehicles driving through the city centre and prioritise sustainable transport options. The presentation will also cover the thinking, delivery and results of this work and how it worked in relation to the CAZ.

1. Slide 209
Economy of Place
City Transport
Bristol’s Clean Air Zone
Adam Crowther – Head of City Transport

2. Slide 210
Economy of Place
City Transport
Overview
• Options
• Street Space Schemes
• Proposed Scheme – Mitigations, Exemptions
• Diversionary Impacts
• Financial / Economic Impacts

3. Slide 211
Economy of Place
City Transport
Options
Preferred Approach:
• No charging zone
• Sustainable improvements to transport network to reduce pollution etc
• Public Engagement – Mayor’s call to action
• Enhanced monitoring and measurement
• Traffic flow management where possible
• COVID impact – lack of public transport capacity, traffic volumes
Other options reviewed:
• Medium CAZ C with a Small CAZ D
• Small CAZ D plus Street Space schemes and Fast Track measures

4. Slide 212
Economy of Place
City Transport
Medium CAZ C, Small CAZ D Boundary

5. Slide 213
Economy of Place
City Transport
Small CAZ D Boundary

6. Slide 214
Economy of Place
City Transport
Street Space Schemes
 Response to COVID 19
pandemic using DfT Emergency
Active Travel Fund Money
 Promote walking and cycling
across the city centre and assist
with social distancing
 Protect and prioritise bus
services through the central
area
 Improve air quality
 Accelerate long term sustainable
transport plans

7. Slide 215
Economy of Place
City Transport
Street Space Schemes - Traffic Impact
 2021 Base Line Model
 Assumes pre-pandemic traffic
flows
 Includes fast track measures
and Street Space projects
 Significant traffic reductions in
central area
 Minor impacts on key Upper
Maudlin St / Park Row corridor
 Some increases in flow around
Rupert St and Bond St/Temple
Way
 No impact on fleet composition
Blue lines –
reduced flow
Green lines –
increased flow

8. Slide 216
Economy of Place
City Transport
Small CAZ D – Traffic Impact
 Comparison to 2021 Street
Space base line
 Assumes pre-pandemic traffic
flows
 Includes fast track measures
and Street Space projects
 Smaller reductions in flow
 Reductions across whole city
centre area
 Also changes split of compliant
and non-compliant vehicles
Blue lines –
reduced flow
Green lines –
increased flow

9. Slide 217
Economy of Place
City Transport
Air Quality Results

10. Slide 218
Economy of Place
City Transport
Air Quality Results
 Street Space Schemes improve large parts of
city centre very quickly
 Insufficient improvements to Marlborough St,
Rupert St, Newfoundland Way
 Based on pre-COVID traffic flows
 Limited impact on fleet make up restricts air
quality improvements
 Long term impacts of COVID difficult to assess
 No need to model Med C/Small D again as
already shown to achieve compliance by 2023
 Small CAZ D reduces traffic but also drives
move to more compliant vehicles
 Delivers improvements to Marlborough St,
Rupert St, Newfoundland Way
 Enables compliance by 2023

11. Slide 219
Economy of Place
City Transport
Proposed Scheme
Small CAZ D
 One charging zone – the small zone
 Charges for non-compliant vehicles to enter the zone – Petrol Euro 3 and below, Diesel Euro
5 and below
 Zone in operation 24/7 365 days a year
 Series of mitigations including a loan/grant scheme
 Concessions and Exemptions proposed to be agreed with JAQU – low income earners,
visitors to BRI hospital, standard exemptions (historic, specialist vehicles etc)

12. Slide 220
Economy of Place
City Transport
CAF
Financial Support:
 A loan/grant scheme to assist those earning low incomes/needing to travel into the zone to
work, to replace or upgrade their vehicle
 Provision of grants for taxi, private hire and LGV drivers to upgrade and / or retrofit their
vehicles
 A loan scheme to assist small local businesses to replace their vehicles
 Additional funding for supported bus services and coaches to retrofit vehicles and avoid CAZ
charges
Infrastructure*:
 Increase, improve and update Legible City Signage
*Note cycle schemes removed following OBC as could not be shown to drive compliance. Old Market Gap scheme
funded through Implementation Fund

13. Slide 221
Economy of Place
City Transport
CAF
Sustainable Travel Choices:
 Mobility credits and/or subsidised bus travel for certain demographic or income groups
 Targeted door knocking / roadshows in areas of deprivation
 Business support and engagement including personalised travel planning and building
audits, targeted at small local businesses
 CAF scheme promotion; leaflets / publicity / events / website etc.
Freight:
 Micro-consolidation unit with cargo freight bikes and Only Mile Delivery centre

14. Slide 222
Economy of Place
City Transport
Diversionary Impacts
 Cheltenham Rd – 21% reduction
 Newfoundland Way – 34% reduction
 Church Rd – 27% reduction
 Additional 90 pollution monitoring
tubes being installed to monitor
impacts
 Aim to invest in Liveable
Neighbourhoods around zone
boundary dependent on income
generated

15. Slide 223
Economy of Place
City Transport
Diversionary Impacts - 2021
 Clifton Suspension Bridge 4.5% AADT 2-way increase;
 St. Pauls Roads 5% AADT 2-way increase;
 Cotham Hill 2% AADT 2-way increase;
 Lower Ashley Road 2.5% AADT 2-way increase;
 Midland Road 5% AADT 2-way increase; and
 Bedminster Road 4% AADT 2-way increase.
 Within the CAZ boundary, Coronation Road, 5% AADT 2-way increase in
flows, due to the closure of Cumberland Road in the inbound direction.

16. Slide 224
Economy of Place
City Transport
Diversionary Impacts
Road
2023 Modelled Emissions µg/m3
Baseline (no scheme) Small CAZ D Change
St Paul’s Rd 20.4 20.5 0.1
Cotham Hill 22.9 23.0 0.1
Lower Ashley Rd 34.7 35.8 1.1
Midland Rd 23.8 23.1 -0.7
Coronation Rd 26.3 23.5 -2.8

17. Slide 225
Economy of Place
City Transport
Draft Financial / Economic Impacts
 PVB £24m over 10 years
 PVC £142m over 10 years –
 £43m behavioural response in terms of changing trips, avoiding zone,
changing mode
 £57m capital cost
 Net Operating position £17m surplus over 3 years
 Sensitivity tests indicate could be much lower dependent on behaviours etc
 Look to invest surplus in vehicle grant/loan scheme and liveable
neighbourhoods around the zone as priorities

18. Slide 226
Economy of Place
City Transport
Next Steps
• FBC sign off JAQU – expected Oct/Nov 21
• Scheme Implementation – Summer 22
• Compliance year 2023