This sentence needs expanding in more specific terms:

“Innovative and flexible solutions will be sought to internalising trips and reducing vehicle use, including through measures such as digital infrastructure and last mile deliveries.”

– “internalising trips” is about locating more amenities – for work, education, retail, leisure, sport, culture and health – within a comfortable walking or cycling distance of people’s homes. This is more commonly referred to as designing 15- or 20-minute neighbourhoods.
– “digital infrastructure” is about installing reliable high-speed broadband into all homes, businesses, schools and co-working spaces.
– “last mile deliveries” is about providing a hierarchy of break-out/consolidation depots to enable efficient movement of goods to and from homes and businesses. These will also provide collection points for private individuals, so that they do not have to be at home to accept a delivery.

The evidence base for this policy includes a Transport Evidence Report. This sets out to model the travel demand that will derive from the build-out of the Preferred Option. It also seeks to model the modal shares for trips in 2041. There appear to be some errors in the report, which we have reported separately. These need to be corrected and any modelling connected with those errors checked.

There are two areas of grave concern:
1. The modelling assumes that motor traffic will continue to grow from the 2015 baseline, contravening an objective of the Greater Cambridge Partnership and a key recommendation of the Cambridgeshire and Peterborough Independent Climate Commission.
2. The modelling also assumes a huge growth in use of Park & Ride, creating a very substantial amount of land which is not allocated in the draft Local Plan.

*Traffic growth*
The Transport Evidence Report quotes modelling that has the following changes relative to a 2015 baseline:
– 19.5% increase in trips by car in 2041 based on current Local Plan commitments.
– 23% increase when new developments in the draft Local Plan are also included.
– 27% increase if and when all land allocated in this plan is built out.

This contrasts with local authority commitments to reduce traffic:
– The Greater Cambridge Partnership aims to “reduce city traffic flows by 10–15%” on 2011 levels, which equates to a 17.7–22.2% reduction on 2015 levels
– Cambridgeshire and Peterborough Combined Authority supports “action to reduce car miles driven by 15% to 2030 relative to baseline,” as recommended by the Cambridgeshire and Peterborough Independent Climate Commission.

Furthermore, the government’s Decarbonising Transport strategy states (on p53), “By 2030, we will aim to have half of all journeys in towns and cities cycled or walked.”

This Local Plan must therefore not only restrain growth in motor vehicle trips, it must contribute to a significant reduction in trips and mileage. The modelling indicates that it will do neither.

There is no doubting the scale and difficulty of the challenge, but it is no answer to the climate crisis to pursue policies that further deepen it. Nor can it be left to the Local Transport and Connectivity Plan to do all the heavy lifting.

*Park & Ride*
The Transport Evidence Report assumes a 245% increase in usage of Park & Ride car parks for onward journeys into Cambridge by bus, cycling or walking. In fact, the 2015 base usage of Park & Ride is almost certainly lower than the modelling assumes, since the daily trip quantity implies around 8,800 parking spaces*, when only 6,743 were available in 2015.

In absolute numbers, the Transport Evidence Report assumes that there will be 60,846 car trips to and from Park & Ride sites in 2041, even if all currently planned, but not yet committed, transport measures are implemented. This equates to around 30,400 parking spaces*, compared with just over 7,000 now. The GCP plan to add another 7,000 at:
– Foxton (200)
– Hauxton (2,150)
– Babraham (2,000)
– Madingley (2,000)
– Longstanton (650)

There are no published plans for any more P&R car parks, though there is an indication on some GCP maps of a site at Barton. There is therefore a shortfall of somewhere in the region of 16,000 parking spaces. That is more than double the number of spaces currently available. Even at a compact land allocation of 3.5 hectares per 1,000 parking bays, there is an implied requirement for nearly 60 hectares of greenfield land for car parks and access roads.

Where will these new Park & Rides be located? How many sites will be in the Green Belt? What will be the trip generation characteristics of more Park & Rides for congestion and air quality in South Cambridgeshire villages?
Park & Ride bus services abstract passengers from rural bus services, which leads to a reduction in rural service quality. This has public funding implications and equality impacts for those who do not have access to a car – for instance under-17s, many disabled people, and a large proportion of the poorest households.

*Travel hubs*
Travel hubs are mentioned in the draft policy. Their function and conceptual design need to be explained, especially as the term is now being used inaccurately by the Greater Cambridge Partnership to refer to 2,000-space Park & Rides.

In essence, travel hubs are small railway or bus stations, served by trains and/or express bus services to major local destinations (e.g. Cambridge city centre, Cambridge Biomedical Campus, and railway stations). Those services would normally run frequently from early morning (before 6am) to late evening (at least 11pm).

Travel hubs are connected to the surrounding settlements, workplaces and other amenities by safe and convenient non-motorised user paths. They also include space for feeder and demand-responsive bus services to call in, enabling passengers to transfer to/from rail and express bus services; and a pick-up/drop-off zone for taxis and private vehicles. They would normally have an enclosed waiting area and toilets. They may also have some car parking, but this should be determined at a local level (e.g. by the parish council).

Travel hub car parks, where provided, may also be used for other purposes, including farmers’ and craft markets, and mobile services (e.g. public library and health screening). A travel hub may be co-located with a school (more usually secondary or further education college), health centre, co-working offices, shops, a delivery collection point, and/or other amenities.

*Rail*
Because of the geometric constraints applying to railway infrastructure, it is important that the Local Plan provides some protection for land that could plausibly be used for a railway line or station.
Potential sites for stations include:
– Fulbourn Hospital
– Six Mile Bottom
– Cambridge airport site (Cambridge East station)
– Little Shelford
– Due west of Sawston
– Between Comberton and Toft (East West Rail line)
– Little Thetford

Potential alignments for railways (heavy or light) include:
– Chord linking the western part of the Newmarket line to the Soham line
– Coldhams Lane to east of Fulbourn, via airport site and between Cherry Hinton and Teversham
– Southern Guided Busway to Girton Interchange via Cambridge station square, city centre and West Cambridge (potentially with some central sections and stations underground)
– Haverhill to Stapleford
– Haverhill to Saffron Walden, continuing to West Anglia line

*Road*
The Local Plan should provide some protection for land that could plausibly be used for new or re-routed roads, including:
– Link slips between A14 west and A11
– Link slips between M11 north and A11
– Link slips between A428 and M11
– Link slips between A428 and A1307
– Link between Airport Way and new A14 west-only junction at Lower Fen Drove Way, replacing Junction 34 (Horningsea Rd)
– Harston southern bypass (A10) between Foxton and London Rd, Harston, to the south of the railway line

*Non-motorised user tracks*
Creating a dense network of safe non-motorised user routes is key to creating 15/20-minute neighbourhoods (where most amenities people need to access regularly are within a 15/20-minute walk or cycle ride). The Local Plan should provide some protection for land that could plausibly be used for new non-motorised user tracks, especially where route choices are most limited, including:
– cut-throughs in built-up areas, especially when linking residential areas to local amenities;
– grade-separated crossings of railways and major roads (bridge or underpass);
– bridges over rivers;
– causeways over flood zones;

*Sequencing*
Absolutely critical to promoting sustainable travel behaviours is having safe and attractive options available to people at the time that they move house, start a new job or start at a new school. If the only safe and convenient option is to drive, driving will be the default choice for all trips even when alternatives become available later.
Therefore, no development should be occupied until the full range of active and public transport options planned are available to use. Delayed opening or temporary closures of walking and cycling routes should not be accepted during the build-out after first-occupation. Public transport provision may start as a demand-responsive service to local travel hubs, connecting with rail and/or express bus services, provided it offers the same level of availability as a scheduled service at peak times.

If it is determined that, for instance, Net Zero targets for transport can only be met with large mode-shares for rail-based transport from new settlements or to new employment centres, then the infrastructure and services must be in place and operating before homes and offices or labs are occupied. This would apply to East West Rail or to any light rail (or other mass transit) network planned for Greater Cambridge.

*Levelling up*
Most of Greater Cambridge lacks the quality of transport infrastructure and services that local plans aim to provide for new developments. The new Local Plan needs to include a ‘levelling up’ policy to draw planning gain from new developments, match-funded where possible, to retrofit infrastructure that is missing from areas where planning gain would not normally reach. Interventions required for existing communities include:
– pavements that adhere to modern design standards;
– protected cycle lanes;
– renewal of degraded infrastructure, including footways, cycle tracks and lighting (for which cyclical maintenance funding is no long adequate);
– secure on-street cycle parking;
– new cut-throughs to open up safer and more direct walking and cycling routes.

*The assumed ratio of usage to capacity is two trips to one parking space. Usage can exceed the static capacity of a car park as there will be some turnover during the course of a day (i.e. one parking space may be occupied by two cars at different times, generating four trips to and from the site). However, that is likely to be more than offset by underuse on some or all days. Usage tends to self-regulate at around 85% because that is when people perceive the car park to be full.