DESIGN AND CONSTRUCTION

Note: This page contains extracts from the Sustrans publication "Making Ways". For those who would like to study this document in greater detail, it is available to download  here.

DESIGNING FOR SHARED USE

Sustrans advocate that all off-road paths are for shared use -certainly between cyclists, walkers, those with prams and those in wheelchairs -and in the case of the Wharfedale Trail, with horses as well. All these parties need the same thing, i.e. traffic-free routes, that are carefully designed and well built to encourage their use. Shared use is good value for money and improves the security of all concerned by populating the paths to enhance casual surveillance. Unfortunately it is normal for authorities to react against shared use. Pedestrians are seen as at risk from cyclists and horses, whereas the reality is that all are vulnerable to motor traffic. It is also worth pointing out that the pessimistic views put forward at public meetings are rarely substantiated in practice. 

It is sometimes forgotten that a very large proportion of the public are discouraged from rough field paths either because the do not have the confidence to use them, the right sort of footwear and clothes, or perhaps even more commonly the energy and strength. Good quality paths on the urban fringe open up the countryside to a wide range of the public, as well as providing some of the few real facilities for wheelchair users. Indeed all these routes should be specifically designed for wheelchairs -ramp gradients should be gentle, and access controls, where used, should be appropriate. Such paths are also suitable for people with visual impairment -grassed path shoulders define the route without the need for expensive tapping rails. Furthermore, these paths are refreshingly stress-free without the ever present noise of motor traffic.

The design and construction of  the Wharfedale Trail will inevitably require compromise to be reached between three major influences: cost, suitability for purpose and the environment; the latter consideration also including the interests of landowners.  Constraints placed upon the design by these factors may also require compromise between the interests of the different user groups. For example, a 2-metre wide tarmac path with adjacent 1.5-metre crushed stone-surfaced bridleway might be an ideal way to facilitate shared use between walkers, cycles, wheelchairs and horses, but whilst it would be suitable for semi-urban or open rural areas, it would probably be considered unacceptably intrusive in remote woodland. At the other extreme, a 0.6-metre loose-surfaced path would be both cheap and unobtrusive, but would be suitable only for use by walkers and not by other groups. The disruption cased by laying a tarmac path may be considered unacceptable by land owners, necessitating the path to be lightly laid in other materials, or the reverse might be true, with the requirement for access by farm vehicles dictating a heavy-duty construction. Perceived risk of misuse by motorcyclists may require additional safeguards to prevent access by unauthorised vehicles. Although it is common for existing bridle paths to pass through fields without any measures deemed necessary to separate livestock from the walkers, horses and cyclists that use them, the perceived popularity of a newly created path is likely to result in Landowners' insistence that the path be securely fenced. Ultimately, the entrenched opposition of a landowner could potentially result in the Wharfedale Trail project being unable to go ahead; however, most opposition can normally be resolved through negotiation, and Sustrans have an excellent track record in achieving this.

It goes without saying that if the creation of a new pathway were to have the effect of blighting the very landscape that it was intended to render accessible, then its purpose would already have been defeated. It is fortunate that the proposals for Ilkley-Bolton Abbey require only very short sections to be constructed over "green fields", however there are still areas where particular care and regard for the environment will be required. Of these, the most notable examples are to be found in the Lob Wood, where the former railway trackbed passes through secluded woodland, and close to Bolton Abbey station, where the flooded railway cutting has created a the effect of a miniature wetland. There is much that can be done to minimise the environmental "footprint" of the trail in these places; In woodland, a crushed stone surface of the minimum practicable width may be more appropriate than a standard tarmac path; furthermore, where trees have re-established themselves upon the old trackbed, the line of the path could be designed so as to wind amongst them, thus lessening the visual impact of a long, straight path. (It should be borne in mind that a double track railway formation is in the order of 8 metres wide, so only a small proportion of that width is required for the construction of a path). Where the cutting is flooded, one solution would be to use the established Sustrans practice of constructing the path upon a raised causeway to one side of the cutting, thus minimising disturbance to the remainder. Another solution (albeit more expensive), would be to carry the path upon a raised  "catwalk" over the environmentally-sensitive area; this technique has also been used by Sustrans in the past. These are just a few examples of what can be achieved; there exists a wealth of experience and expertise in utilising best practice in design and construction, to minimise the trail's impact on its surroundings.

The Wharfedale Trail Forum aim to work closely with Sustrans, landowners and various interest groups, to ensure that all options and interests are considered, in order to achieve the best compromise and the most appropriate solution for each part of the proposed route.

PATH WIDTH

Widths can (and must) vary. Sustrans recommend  2 metres as the narrowest  for shared use, and this relies upon there being clear verges to allow groups to pass one another. The diagram below shows some examples of path widths appropriate to different  users; with regard to the setting of the Wharfedale Trail, it should be remembered that the ideal width may not always be achievable due to environmental considerations, etc. and extra consideration and courtesy between user groups may be necessary.

TYPICAL CONSTRUCTION

The illustration below shows an example of the construction of a typical multi-user path, comprising a tarmac wearing course and base for the cycle/footpath, on a crushed stone sub-base. Tarmac meets the requirements of  most user groups and requires virtually zero maintenance once laid. There are also a variety of other options available to suit specific circumstances; in this illustration the crushed stone sub-base is extended to form a semi-resilient surface for a bridleway alongside the main path; in some settings it may be appropriate for the entire path to be thus formed, in order to minimise visual and environmental impact. Various surface options are discussed below.

SURFACE

There are many possibilities as regards the type of surface; different surfaces may be appropriate according to the setting and anticipated usage of different sections of the trail.

The decision as to the types of surfaces used will be determined by the outcome of discussions between Sustrans, the Forum, landowners and the public. Comments and suggestions are invited.

SEALED SURFACES

Tarmac (also called bitumen macadam, bitmac, blacktop) is a low-cost, durable, low maintenance solution, and the black appearance lightens in colour over time. 

(A) Tarmac (with wearing course) to give smooth surface, but this is not preferred by horseriders.

B) Tarmac (base course only) to give better grip for   horses, whilst comfortable for other users.

 

Tarmac with addition of stone chippings, allows a more sensitive appearance, at increased cost.

Fibredec – a patented surface dressing product that gives extra strength to a stone base and provides an attractive finish, but is relatively  expensive.

   

 

UNSEALED SURFACES

Typically constructed from a layer of fine crushed stone, gravel, etc. over a coarse stone base.

For: Sympathetic to a rural setting; low initial cost. Durability can be enhanced by application of binding agents. Suitable for all user groups when in good condition.

                     

Against: More prone to damage than a sealed surface, particularly where horses are frequent users. Susceptible to washout and ponding, therefore unsuitable for use where risk of water damage exists, e.g. flood plain, woodland, old railway cuttings etc. Likely to require long term funding for ongoing maintenance.

                             

Back to Homepage