Travel plan targets and monitoring: what to commit to

A travel plan target is only worth writing if somebody can measure it five years later. That is the whole test, and it is where most travel plan targets and monitoring sections fall down. A plan promises cycle parking, a welcome pack and a car club bay, then sets an aim to "encourage sustainable travel" that no survey return can ever prove or disprove. The highway authority signs it off because the measures look sensible, the obligation gets drafted around it, and nobody can enforce anything when the site is occupied and the traffic looks nothing like the forecast.

The Planning Practice Guidance on travel plans, transport assessments and statements is clear that a travel plan is a long-term management document, not a list of good intentions submitted to get past validation. On a major residential or commercial scheme it will normally be secured by a planning obligation under section 106 of the Town and Country Planning Act 1990, which means the targets you write become a contractual promise attached to the land. Write them loosely and you inherit an argument. Write them tightly and you inherit a budget line you can forecast.

What makes a travel plan target measurable

A usable target has four parts: a quantity, a unit, a date and a method. Drop any one of them and the target stops being enforceable.

Take a target of "a 10 per cent reduction in single-occupancy car trips". Reduction against what, measured how, by when? The same intent written properly reads: single-occupancy car mode share for journeys to work by residents will be no more than X per cent of all journeys, measured by the standard residents' travel survey described in section 7 of this plan, at the third annual monitoring survey.

Now the officer knows what to check. So does your client, who will be paying for the survey and possibly for the consequences.

Targets fall into two families and it helps to keep them apart in the document. Outcome targets describe travel behaviour: mode share, trip rates, average vehicle occupancy. Output targets describe what you deliver: a certain number of cycle spaces installed before occupation, a personalised travel planning session offered to every household within three months of moving in. Highway authorities generally want both, because an output target can be verified immediately while an outcome target needs years of data.

Setting the baseline before anyone moves in

The baseline is the number everything else is judged against, and getting it wrong poisons the whole monitoring programme.

For a new-build scheme there is no existing travel behaviour to survey, so the baseline has to be constructed. The usual sources are the trip rates used in the supporting Transport Assessment, local journey-to-work data from the census for the relevant output areas, and, where the site replaces an existing use, a survey of that use before it closes. Say which you have used and why. An officer reading the plan should be able to reconstruct your baseline from the appendices without asking you a question.

Where the development replaces an occupied building, survey it while it is still occupied. This sounds obvious and is routinely missed, because the travel plan is often written months after the application when the tenant has already gone. Once the building is empty the baseline becomes an estimate, and an estimate is exactly the sort of thing that gets challenged when a target is missed.

For phased schemes, decide early whether the baseline is set at first occupation of phase one or reset for each phase. Both are defensible. Only one can be in the obligation.

Mode share targets and the evidence behind them

A mode share target splits all journeys made to and from the site into categories: car driver, car passenger, bus, rail, cycle, walk, and increasingly work from home. The target is a percentage of that total, not a number of vehicles.

Two practical points decide whether the target survives negotiation. The first is the journey type you are counting. Journeys to work, all journeys by residents, and all journeys crossing the site boundary give very different percentages, and a plan that switches between them across its sections will be picked apart. Pick one definition, state it in a single sentence, and use it everywhere including the appendices.

The second is realism. Setting an ambitious mode share target on a site with an hourly bus service and no safe cycle route to the town centre is not ambition, it is a future default payment. The honest approach is to derive the target from the measures you are actually funding, then show the arithmetic. If the plan funds a bus service contribution that halves the headway, say what shift in bus mode share you expect from that and where the assumption comes from.

One uncertainty worth naming: home working has moved the denominator in journey-to-work data since the 2021 census, and there is no settled convention for how travel plans should treat it. Some authorities count a home-working day as a suppressed journey, others exclude it from the sample entirely. Agree the convention with the officer in writing before the plan is fixed by an obligation, because it can swing a mode share figure by several points.

The travel plan coordinator and what the role actually does

The travel plan coordinator is the named person responsible for delivering the plan, commissioning the surveys and reporting to the authority. On residential schemes the role usually sits with the management company. On employment schemes it sits with the occupier, which creates a handover problem the plan has to solve.

The plan should state when the coordinator is appointed, who employs them, how much of their time the role takes, and what happens when they leave. Contact details go in an appendix so they can be updated without varying the obligation. A plan that names an individual in the body of a section 106 agreement is a plan that needs a deed of variation the first time somebody changes job.

Where the eventual occupier is unknown at the point of consent, the developer's coordinator writes the framework travel plan and the occupier produces a full plan within a set period of taking possession. That two-stage structure is standard on speculative employment floorspace and should be spelled out rather than implied.

Survey frequency and the length of the monitoring period

A monitoring survey schedule of five years from first occupation, with surveys at years one, three and five, is the pattern most often secured on major schemes. Some authorities ask for annual surveys throughout. Either way the plan needs to say three things about each survey: when it happens relative to occupation rather than to a calendar date, what sample size counts as valid, and what the survey instrument is.

Neutral months matter more than people expect. Traffic and travel surveys are conventionally run outside school holidays and away from December, for the same reason parking surveys are. A year three survey run in the last week of July is not comparable with a year one survey run in October, and the authority will be entitled to say so.

State the occupation threshold that triggers the first survey in units or floorspace, not as a percentage of "substantial completion". Percentages of vague quantities are the single most common drafting fault in this part of a plan.

Remedial measures and how they are secured

If a target is missed, something has to happen. That something is the remedial measures mechanism, and it is what converts a travel plan from a document into an obligation with teeth.

There are three common structures. The first is a remedial measures fund: a sum, indexed, held by the authority or drawn down on demand, spent on additional measures agreed between the parties. The second is a schedule of contingency measures in the plan itself, tiered by how far the target was missed, which the coordinator must implement without further negotiation. The third is a default payment triggered automatically by a missed target, usually the least popular with developers because it pays for nothing on the site.

Most negotiated plans combine the first two: a defined menu of contingency measures, with a capped fund behind it. That structure is easier to value at appraisal stage and easier for the authority to enforce, because the trigger and the response are both written down. It also gives the coordinator something useful to do in year three rather than a cheque to write in year five.

Whatever the structure, cap it. An uncapped remedial obligation is very difficult to price into a viability appraisal and harder still to explain to a funder.

Writing the obligation so it can be enforced

The travel plan and the section 106 obligation have to agree with each other. In practice they are drafted by different people at different times, and the mismatches are predictable.

Three to check before completion. Does the obligation define the travel plan by version and date, so later amendments need approval rather than happening silently? Does it say who approves a revised plan and within what period? Does the monitoring fee cover the authority's cost of reviewing the survey returns, and is it indexed?

The Planning Practice Guidance on planning obligations and the guidance on the use of planning conditions both push authorities towards conditions where a condition will do the job. A short travel plan on a minor scheme is often better handled by a condition requiring approval and implementation of a plan, with the substance in the approved document. Reserve the section 106 route for schemes where money changes hands or where obligations run with the land after sale. The same logic applies to other post-construction reporting duties, including the reporting structure in a circular economy statement, where the trigger points need to sit in the consent rather than in a report that can be revised.

A Travel Plan drafted this way is a short document with a long tail. Get the baseline, the definitions and the remedial trigger right and the rest is administration.

Enter your postcode on PlanScope to see which reports your site is likely to need before you commission the transport work.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.