Thanks for the suggestion! During the later planning stages of the recovery content pack, advisors did push to include highways agency traffic officers and their base stations as additional parts of the update. Unfortunately the devs would only include it if it was an extension for other stations, rather than as a standalone feature, therefore due to this not matching how the UK Highways Agency works, we were unable to settle and ultimately it was left out of the pack.
We still want to get this feature added down the line, but have no plans to do so in the near future at this stage.