Health Outcomes of Travel Tool will be updated

The Health Outcomes of Travel Tool (HOTT) will be updated within the next week based on user feedback and new data.

The importance of HOTT has never been higher, and the SDU expects that all Trusts will use the tool. The NHS Long Term Plan sets out clear targets for the NHS; to reduce air pollutant emission from business mileage and Trust fleet by 20% by 2023/24. An additional, ten year target has been set, that at least 90% of the NHS fleet uses low-emissions engines (including 25% ultra-low emissions vehicles) by 2028.

The update to the tool is required to ensure the latest science and data is used in the calculations. DEFRA damage cost information has been updated and there are now multiple years of Trust and CCG level data in the tool such as staff (FTE), patient activity (Hospital Episodes Statistics) and new ERIC data.

These data sources have been added to make the tool easier to use and more reflective of national data sets, you can still overwrite much of this data if and where relevant.

It is strongly advised that users move data into the new version of the tool (version 3). The data entry of the new version is the same/or improved as the original, so simply copy and paste your data where relevant – it may be useful to use the new and updated patient activity and Department for Transport (DfT) projections for future England car fleet.

The SDU will explore further ways to support uptake, and the existing tutorial videos and the guidance on using the tool on the SDU website are still relevant.


Next Steps

We are working to embed onsite sources of air pollution into the tool, this will provide the means to assess different approaches to onsite energy generation, waste incineration and energy resilience.

The SDU are always open to feedback and insight on the tool, please contact us via; https://www.sduhealth.org.uk/about-us/contact-us.aspx


A summary of changes to the Health Outcomes of Travel Tool (HOTT):

New DEFRA damage costs have been added – meaning the economic evaluation of NOx has decreased and the evaluation of PM2.5 has increased, people will see a net reduction in the economic impact of air pollution. The science still only covers the tip of the iceberg for health and society economic impacts.

There are updated assumptions for public transport – this has significantly reduced the impact of public transport. The previous assumptions used low DfT average occupancy for buses and the tool “added” another bus to the road when this threshold has been met, it now uses a more real-world approach with a weight based process. So, for every person more weight is added to the existing buses and therefore it lowers it MPG, rather than adding more buses to the road.

The tool has improved data sources for average commute distance for healthcare professionals (in and outside of London) which has increased the average distance travelled per member of staff. Please feel free to over write this assumption with data from a local travel survey or postcode mapping exercise.

In all interfaces 2018 is used for the default scenario – please feel free to use scenario one to build a specific local baseline pre-2018 if and where you have data.

There is now more granularity in the detailed results for air pollution.

You can now specify the modal share of business mileage (all business mileage data reported in ERIC 2017/18) has been stated as 100% car – please separate out where possible and please feel free to put fleet miles in the logistics tab and adjust the modal share accordingly to local data).

Using the updated forecasts for the car fleet in England from the Department for Transport.

Updated the list of organisations and STPs as per the latest ODS data and new NHS England regional breakdown.

An updated summary sheet provides a better breakdown of the financial impact to hot spot areas to target.

In the provider non-ambulance interface staff commuting and business mileage data outcomes have been separated for ease and consistency.