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Site Impact Analysis
>> Projects Requiring a Site Impact Analysis>> Projects Requiring a Simplified Application
In order to manage and maintain the safety and integrity of existing and future highways, it is essential to assess the amount of new traffic entering the highways from adjacent developments, and to design thoughtfully the access and layout configuration of the developments. Within the context of provincial, regional, corridor and local plans, a Site Impact Analysis evaluates alternative access possibilities and provides information which will help determine the acceptability of proposed access points. Complete information is available in the Site Impact Analysis Review Manual. The main points are summarized on this page.
Using the Site Impact Analysis Study, Ministry staff can:
- Determine the contribution a particular site or group of sites makes to the roadway system traffic loads
- Identify roadway improvement requirements attributable to a particular project
- Assess compatibility with local, regional and provincial transportation plans
- Evaluate alternative access possibilities
- Determine the acceptability of proposed access points
Site Impact Analyses also help ministry staff to design or approve:
- additional travel lanes or separate turn lanes on the highway
- on-site storage lengths
- the internal layout of parking
Study Review
The Site Impact Analysis Requirements Manual provides guidance on how the need for a study is determined. Ministry staff will determine whether a detailed Site Impact Analysis Study must be submitted in support of the application or whether a Simplified Application Review Process may be followed.
The three main components of the process for undertaking a Site Impact Analysis Study include:
- Determining the need for a detailed Site Impact Analysis Study
- Determining the required components of a study
- Detailed study review process and simplified study review process
The following is a list of some of the situations when the Ministry may request a detailed or simplified Site Impact Analysis Study:
Those affected by the above should contact the local Ministry District Office before submitting an application and/or a study in order to determine whether a Site Impact Analysis Study is required and how it should be conducted. Contact the Local Government to determine their study requirements and to obtain information on any local issues, land use plans and the feasibility of alternate access. A more complete listing of stakeholders can be found in Section 2.10. of the Site Impact Requirements Manual.

Projects Requiring a Site Impact Analysis
Detailed Site Impact Analysis Study Warrants
Due to the diversity of the types and locations of developments in British Columbia, ministry staff must consider detailed study warrants at both the general provincial level and at the site-specific level.
In general, a site which has an estimated trip generation rate of 100 or more two-way trips, (i.e. inbound plus outbound) during the peak hour requires a detailed Site Impact Analysis Study.
The applicant may be required to reconstruct, relocate or close the access to conform to the highway operational requirements if a change in use of the property results in a change in the type or nature of access operation.
There may be other site specific factors which Ministry staff must consider in determining whether to require a detailed Site Impact Analysis Study for a proposed development which has an estimated trip generation rate below 100 peak hour trips, including:
- Environmentally sensitive areas where road widening may be required
- High accident areas
- Currently congested areas
- Regional planning or corridor planning areas
For this reason, before submitting an application please consult with the District Office to determine whether a study is required. District and regional staff will determine whether these or any additional issues affect the warrant for a study for a specific site.
If the District Development Technician determines the need for a detailed Site Impact Analysis Study, a Proposed Study Terms of Reference must be submitted. This is available in Appendix A of the Site Impact Analysis Review Manual.
The requirement on the applicant differs depending on the size of the development. If a development may produce more than 100 vehicles per hour, then the applicant will be required to do a Detailed Study. If it is smaller than this, the applicant will be advised whether the Simplified Application Review Process applies or whether the project requires a Detailed Study. Some examples of developments that produce 100 trips per hour are:
- 100 houses
- 150 condominium units
- 900 square meters of commercial development
- 5,260 meters of general office building
- 150 square meters of fast food/drive-through
- 130 hotel rooms
A general four-step process is listed below. Throughout the application process, access, safety, and through-traffic needs are the most important issues assessed by the Ministry.
Step 1:
- The proponent introduces the development.
- The Ministry outlines its first-cut issues based on its knowledge of the area of the proposed development, and instructs the proponent to develop trip generation and parking generation rates.
Step 2:
- The proponent describes how development traffic will interact with the highway and local road system.
- Trip generation, distribution, and assignment are discussed. If not using MoT trip generation rates, the proponent must explain why. This is a very important step because after this all of the Ministry-approved assumptions will be "locked down" throughout the remainder of the process.
- The proponent can then develop options for ensuring that safety and mobility are maintained on the highway and local road system, at the access point(s) and on the development site.
Step 3:
- The options are discussed.
- When there is agreement on a recommended option, the proponent can start the final report.
Step 4:
- The final report is reviewed.
- The Ministry checks to see that all assumptions and analysis were as agreed.

Projects Requiring a Simplified Application
In some cases, Ministry staff will use a "Simplified Application" to evaluate traffic impacts of a proposal, instead of a full-scale Site Impact Analysis. This tends to be the case when:
- The estimated peak hour trip generation rate is below 100
- Safety issues are not a big factor
This simplified process has been established in the Site Impact Analysis Requirements Manual for sites which are not expected to have a high impact on the road network that they will connect to. The District Transportation Office will outline any required information on a checklist. When a developer inquires about an application, ministry staff will go over the following elements, from the Site Impact Analysis Review Manual:
- A complete description of the proposed land use, including the size and type of each property.
- The type of development, including the number of units and buildings and the area of each.
- Subdivision plans or maps.
- Proof of subdivision approval.
- Zoning plans or maps.
- Proof of zoning approval and any zoning conditions for the site.
- Site development plan, or other plan or map including both sides of the highway and all corners
of any driveway or intersections on, across, adjacent to or near the property affecting the
proposed access design or operation.
- Site plans which shall clearly indicate the location of the property, existing conditions and the
character and extent of the access work proposed, opening date or phasing of the proposed
development and buildout year.
- Vicinity, property, parcel and ownership maps including easements, maps indicating any other
access and abutting public roads and streets, with clear indication of all contiguous ownership.
- Property description (text format) including dimensions, maps and easements.
- Recorded copies of titles of ownership.
- Legal proof that an easement or agreement exists allowing cross access between adjacent
properties.
- Maps and letters detailing utility locations before and after development in and along the
highway.
- Highway plan and grade.
- Access plan and profile.
- Proof of liability insurance or service agreements.
- Complete drainage plan of the site showing impact to the highway right-of-way and drainage
system.
- Examine impacts of drainage plan on downstream properties and watercourses.
- Proposed access design and appurtenances including but not limited to width, radii, angle to
the highway, taper lengths, auxiliary lane lengths, shoulders, sidewalks, curb and gutter,
proposed and existing drainage structures and ditches, grade of side slopes, pavement design
including base and surfacing materials and thickness (minimum scale 1:500). This drawing
must be prepared by a Professional Engineer of BC using standards outlined in the current
edition of the Ministry’s Design Manual.
- Highway capacity analysis to determine off-site mitigation requirements. This should include
other proposed future developments within the study area according to existing zoning.
- Traffic data, information and analysis for the land use including prior, existing and future
conditions to full development for peak hour volumes for each design element and total
average daily traffic, trip generation, distribution and assignment for each land use as outlined
in the Site Impact Analysis Requirements Manual. Studies for retail commercial sites should
include Saturday and Sunday peak hour analysis.
- A traffic signal operation analysis, including all input and output reports and all factors.
- Grades, both existing and proposed for all features including: setback and location of
structures, curb, gutter, sidewalks, signs, utility poles, lighting, underground utilities, all site
access, access design, contours, number and location of lanes, parking areas and traffic
circulation aisles, magazine location and lengths, pavement location and types, drainage
systems, side slopes and profiles with location of top and bottom, size and design and
elevations of drainage pipes.
- Plans pertaining to all parking, interior drives and internal traffic circulation plans, magazine
storage, pedestrian and cyclist facilities, transit facilities, building location, traffic control devices
and lighting locations.
- Internal and external signing and striping plans (including temporary and permanent).
- Traffic control plan for any construction work when the work or construction will encroach upon
the current highway.
- Studies and or clearances determining that natural and cultural resources including flora, fauna,
paleontology, archeology, historical sites and cemeteries will not be damaged or destroyed
during and after development.
The applicant submits the application and the required information to the District Office.
If the application and attached information are acceptable to Ministry staff:
- The applicant will be notified of the conditions of approval
- If the applicant agrees to the conditions of approval specified for the site, then they must forward a letter indicating their acceptance to the District Office.
If the application and its attachments are not acceptable:
- The study will be returned to the applicant stating the reasons why the study was not accepted.
All submitted materials become the property of the ministry.
Once the applicant has submitted a letter of agreement to the conditions of approval, the applicant can complete the application process. The applicant must follow the construction process below, to ensure that any construction on Ministry right-of-way is completed according to Ministry
standards and specifications.
- Where road improvements were proposed and approved, the Ministry issues a
permit to construct on highway right-of-way.
- The applicant will provide a letter of credit, bond or security deposit to the
district or Local Government.
- The Applicant must contact the District Office prior to commencement and
completion of the construction to arrange for interim and final inspections.
- When the work is compete, a final inspection is required by Ministry staff and,
where applicable, Local Government staff and other Reviewing Agencies.
- When the final inspection is acceptable, a letter of acceptance will be issued
and the security deposit, where provided, will be returned.
In addition to the information provided on this website and the Site Impact Analysis Requirements Manual the Ministry's district office staff can provide a any information you may required for these applications.

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