Phil Bibby on Dinant Link Road issues

We reached out to Phil Bibby regarding the dire ongoing Dinant Link Road situation, as many residents were unsure as to what is going on.

  1. Will the same contractors be allowed to carry out the works in Spring of 2019? In regards to this, many residents are concerned that the current contractors have failed to adequately carry out the works numerous times and questions regarding competency are now being raised.

Under the Section 278 Agreement we have with the developer, it is their responsibility to appoint a contractor for these works and to ensure that these works are carried out to an appropriate standard.

2. Some local residents who have knowledge of construction have raised concerns over the turning force that will be exerted on surface of the dumbbell roundabout. There are concerns that the roundabout is not fit for purpose and will likely continually damaged in warmer summer months – when the surface of the road is more malleable and softer. In regards please could you answer the following:

(a) The steep turning/steering angle of vehicles, especially of heavy goods vehicles, may cause damage that warrants road repairs at an above average rate, do you agree with this?

The carriageway surfacing materials have been designed following the procedures within HD26/06, based on the likely number of vehicles using the route in the design year. Please note that the material specified for the roundabout is adequate and what would be specified when designing a similar site in terms of a carriageway maintenance scheme. HD26/06 is part of the Design Manual for Roads and Bridges (which is a national design guide), and covers Pavement Design. Pavement design in this context means the road design. This Standard provides the details of permitted materials and of thickness for the construction of pavements (road) for new trunk roads.

(b) If you do not agree with the above, then are you able to offer any assurances that we will not seen continual roadworks on the dumbbell roundabout each year, to repair the surface?

The roundabout will be monitored for 12 months, as per the normal maintenance routine for such works, following completion.

(c) Do you believe the dumbbell roundabout has been well designed?

The size and layout of the roundabout is in line with the scheme consented by the Local Planning Authority (Broxbourne Borough Council), and as contained within the Transport Assessment. It has been designed following the requirements of TD 16/07, and has been subject to an independent Road Safety Audit. TD 16/07 is part of the Design Manual for Roads and Bridges (which is a national design guide), and it sets out the design standards and advice for the geometric design of roundabouts.

(d) Do you believe the dumbbell roundabout will be fit for purpose, once the remedial works are hopefully completed this spring?

We believe that the roundabout will be fit for purpose once all the remedial works are completed this Spring.

(e) Do you anticipate the works in Spring 2019 on the dumbbell roundabout to be the final set of remedial works required?

After completion of all remedial works in Spring 2019, the scheme will be subject to a Stage 3 Road Safety Audit (RSA). During the Stage 3 RSA, the Audit Team should consider whether the design has been properly translated into the scheme as constructed, and that no inherent road safety defect has been incorporated into the works. The Stage 3 RSA may lead to further remedial works.

(f) Are there any other concerns or worries you have regarding the Dinant Link Road dumbbell roundabout?

No other concerns or worries.

Our View

  • We are concerned that the same contractors will be allowed to carry out the works again. They have already failed to meet the specifications multiple times. Hopefully the same contractor is not allowed to carry out the works again.
  • The minimum standards set legally are not always the most appropriate or sufficient for the surfacing or angle of the roundabout.
  • No particular assurances are offered to if the roundabout will withstand use, only that it will be monitored for 12 months.

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