Stable infrastructure conditions
The selected scenario remains within indicative operating tolerances.
scenario signal
Highway capacity pressure
V/C means volume divided by capacity. Below 0.85 is broadly manageable; 0.85–1.00 is pressured; above 1.00 indicates likely capacity breach.
The bars show which corridor points become constrained first as developments and pressures are added.
Assumptions and limitations
This is an indicative public scenario tool. It does not replace validated junction modelling, NHS estate planning, statutory planning assessment or professional advice.
Healthcare infrastructure pressure
Population proxy for primary care capacity and potential mitigation.
Scenario summary
Current active inputs and result interpretation.
Baseline traffic note
This explorer starts from Department for Transport traffic count data: 16,530 vehicles on the A38 North Petherton / Huntworth corridor. The baseline uplift slider adjusts this starting traffic before scenario pressures are added. Development scenarios, HPC movements, logistics, tourism and M5 disruption are additional pressure above the adjusted baseline.