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National annual data quality results

One Network Road Classification (ONRC) data quality results

The table below shows the annual ONRC data quality results for all Territorial Local Authority Road Controlling Authorities (RCAs):

ONRC DATA QUALITY DIMENSION METRICS ACHIEVING THE EXPECTED STANDARD (%)2014/152015/162016/172017/18+
All dimensions 45% 48% 57% 58%
(58%)*
Completeness 62% 59% 61% 59%
(57%)*
Accuracy 37% 50% 60% 65%
(67%)*
Timeliness 44% 37% 48% 33%
(44%)*

+ Due to issues with some metrics, the 2017/18 results were updated in February 2019 and RCA reports were re-issued.

*  The 2017/18 bracketed results are comparable to the 2016/17 result. The results shown in brackets remove enhancements made to the framework in 2017/18 to provide a clearer comparison of change over the period. These results:

  • exclude the DoC network and metric Su4 which are included in 2017/18 for the first time
  • include the four retired metrics in 2017/18 (Su1, Ro2, TC2 and TC5)
  • are based on the primary dimensions prior to changes made in 2017/18.

The results in the above table are calculated based on the number of RCAs with a metric result within the expected standard range. The results are aggregated to the primary dimension and all dimensions level for each reported financial year. The results for each year also reflect the framework of metrics reported at the time.

An initial interrogation of the ONRC results indicate a favourable improvement for ONRC data quality. The increasing expected standard (grade 1) result is offset by a declining potential major data issues (grade 3).

There was a step change improvement between 2015/16 and 2016/17. This coincides with the 1st opportunity RCAs had to ‘improve’ their data prior to a known data quality report being produced.

Annual ONRC results by grade

Significant improvements to the maintenance activity data is a major contribution to the overall improvement trend.

Further analysis of the results is being undertaken and will be published online in the new year. Watch this space.

Asset management data quality results

The table below shows the annualised asset management data quality results for all Territorial Local Authority RCAs:

ASSET MANAGEMENT DATA QUALITY DIMENSION METRICS ACHIEVING THE EXPECTED STANDARD (%)2016/172017/18+
All dimensions 46% 45%
Completeness 50% 49%
Accuracy 40% 40%
Timeliness 45% 45%

+ Due to issues with some metrics the 2017/18 results were updated in February 2019 and RCA reports were re-issued.

While the latest 2017/18 data quality assessment has shown an improvement in data quality, we are reminded there is considerably more work to be done by the sector to continually move towards the expected standard in time for councils’ 2021/31 Activity Management and Long Term Plans.

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