Traffic Impact Study

A traffic impact study or traffic impact assessment is a study which assesses the effect that a particular development has on the transportation network. A traffic impact study is generally required by roads authorities to evaluate the impact of a change in land use. These studies are a part of the mandatory process to be followed by an applicant to obtain new land use rights. A traffic impact study vary in complexity depending on the size of the development, the current and proposed land use and the location of the development. Various traffic engineering concepts and principles are applied while conducting a traffic impact assessment. We have conducted traffic impact study for various developments comprising of residential, business, retail, industrial and offices. We have also conducted studies for filling stations, mixed use developments and also transit oriented developments.

There are several steps within a Traffic Impact Study, including trip generation, trip distribution, mode choice and assignment, which are then followed by capacity analyses and the identification of possible road upgrades. Specific assistance is given to identify road upgrades, to ensure that a realistic first order road upgrade costing is provided which takes into account physical site limitations that might have an impact on the final road upgrades to be recommended. In the process, Koleko ensures that the applicant gets the value for money.

Koleko Solutions has conducted several traffic impact assessment for various developers. Koleko Solutions has conducted traffic impact studies for residential developments, retail, offices, businesses and also mixed use developments. We are familiar with the standards and requirements prescribed by the various municipalities and provinces. While conducting the study, we adhere to the traffic impact study standards. This ensures a quick approval of the study, causing little delay to the development.

A traffic impact study is generally used to:

  • Assess impact of traffic due to new development (or re-development)
  • Support comprehensive plan amendments
  • Support rezoning applications
  • Support subdivision of land applications
  • Obtain site plan approvals
  • Obtain driveway or access permits
  • As a part of environmental impact assessment
  • Prepare traffic mitigation plans
  • Determine developer /bulk contribution
  • Determine cost apportionment
  • Development access/egress and on-site circulation plans


Road Closures & Traffic Calming in Residential Areas

Traffic impact study needs to be conducted for enclosed neighborhoods and street closures. In South Africa, road closures are often pursued by neighbourhood / home owners’ associations in order to reduce crime. The home owners association also approach us to reduce cut through traffic through their residential area and to help reduce speed on residential streets. Traffic calming includes physical design and measures that are put in place with the intention of reducing or slowing motor vehicles thereby improving safety of pedestrians and cyclists, especially in residential neighbourhoods.

Several important aspects need to be taken into consideration, such as the need for community involvement, the relevant road hierarchy, horizontal and/or vertical deviations required to achieve traffic calming objectives, pedestrian accessibility, existing public transport, schedule and routes of garbage trucks, and the role that decision makers play in the traffic calming process.


Orange Farms Shopping Center – Traffic Impact Study

The proposed shopping center is located in Orange Farms, Johannesburg. Koleko Solutions was appointed to conduct a traffic impact study for the proposed development, which was about 1 250 sqm in area. The study investigated the impact of the additional traffic generated by the proposed shopping center on the immediate surrounding road network and it determined the need for road upgrades to mitigate the anticipated traffic impact.

Read more about Orange Farms Shopping Center – Traffic Impact Study.


Van Riebeeck Street Closure – Traffic Impact Study

Van Riebeeck is a residential neighbourhood in Ekurhuleni Metropolitan Municipality, that has recently experienced a lot of crime. In order to address the issue of rising crime, the  residents via the home owners association applied for road closures. Koleko Solutions was appointed to count a traffic impact study to evaluate the impact of the proposed road closures. The objective of the study was therefore to evalute the traffic impact of the proposed road closures.

Read more about Van Riebeeck Traffic Impact Study.


Residential Development – Traffic Impact Study

Koleko Solutions conducted a traffic impact study for a residential development comprising of over 350 houses. A traffic survey was conducted to determine the existing traffic demand in the area. The expected trips from the proposed development was estimated based on the Technical Methods for Highways (TMH) 17 – South African Trip Data Manual. Once the trip generation was estimated the total traffic for the existing and the future (horizon) year was estimated. The intersection operations during the existing and future scenarios were determined using the Highway Capacity Manual (2010) methodology.

Consequently, the road upgrades required to accommodate the traffic from the development was determined. A conceptual drawing of the road upgrades was developed, along with a preliminary cost estimate. Cost apportionment and the bulk contribution was also determined.


Read more about Traffic Impact Studies

Koleko Solutions – Traffic Impact Study