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The system that challenges and
validates assumptions about the
transport impacts of new developments.

It is the UK and Ireland’s national system of trip generation analysis, containing over 7150 directional transport surveys at over 110 types of development. TRICS® was founded and is owned by 6 County Councils in the south of England, collectively the TRICS® Consortium. However, its annual collection programme covers the whole of the UK and Ireland, across 17 defined regions.


This is reflected in the national spread of member organisations across each of these regions, which we know as the TRICS® Community.

This is the website for that community, as well as being a resource for anyone interested in the field of trip generation analysis. Please have a look around – we look forward to receiving your feedback.

On behalf of TRICS® Consortium Ltd,
I would like to welcome you to the
home of the TRICS® Community.

TRICS® is the national system of trip generation analysis for the UK and Ireland, an essential method of measuring the likely transport generated by new developments. I am pleased to be part of the management group that delivers this integral and established feature of the transport planning and development management process.

2015 sees a milestone in the TRICS® journey. On 1st January 2015 the project was for the first time run by its own company. The creation of this new company will enable the current system to be promoted in foreign countries and will also enable the team to develop some new and exciting products to serve the Transportation Industry. Both these areas of work will enable increased development of our current system and help to improve and expand our data collection programme; all to the benefit of our current members and the wider transport planning industry.

From the outset in 1989, we determined that the users should have an ongoing and direct input into how the project was to be developed, and this unique working relationship with the TRICS® Community has culminated in many upgrades and re-writes over the years, with major milestones being the development of a version of TRICS® for Windows, the introduction of the live system on the web, and, more recently, the major upgrade of the user interface that is TRICS® 7.

Meet the team
Nick Rabbets (Managing Director)
020 3657 2184/ 07500 043 360

Ian Coles  (Project Manager)
020 3657 2185  07799 778 878
Owen Edwards (Assistant Manager)
020 3657 2187/ 07765 383 630

Siddika Begum  (Operations Officer)
020 3657 2186
Ben Brown (Technical Officer)
020 3927 8488/ 07826 180 609

Tracey Spencer  (Operations Officer)
020 3657 2188

User training & demonstrations

The sessions consist of a full system demonstration, in which all parts of the system are covered. This lasts approximately one hour, and is then followed by an optional "hands-on" session where attendees can practice using the latest version of the TRICS® software with specially-designed "test sheets". This is designed to introduce new users to the system.

Each demonstration/training session costs £500 + VAT, and is free of charge to TRICS® member universities. Organisations hosting sessions are asked to provide a computer and projector for the demonstration part of the session, and also to provide the computer facilities for the training part of the session. Non-member organisations will be provided with temporary access to the TRICS® system for the purposes of the session.

One month free trial

A free trial of TRICS® will allow you to view the system's features and the ever-expanding database of transport surveys which TRICS® offers. It is ideal for those interested in purchasing a software licence, allowing them to evaluate the system in full before committing to membership. The only restriction during the trial period is that you cannot use TRICS® for commercial purposes, with the trial being for evaluation purposes only. So why not try the system out before you become a member?

Many new members of the TRICS® Community originally took up this offer, which provides trialists with full use of the latest version of the system, along with unlimited user support. The TRICS® Team can set up your free trial today, it's quick and it's easy - contact us to request your free trial

SAM has been developed by TRICS® as a system of monitoring and assessing the effectiveness of travel plans. It uses long established TRICS® methods of multi-modal data collection enhanced with comprehensive information on travel plan details to produce robust travel plan survey results. Click here for more information.

TRICS office is closing over the festive
period, for the purposes of moving from
5pm on 22 December 2015 to 9am on
5 January 2016.

Our new address as of 5th January 2016 will be as follows:
TRICS Consortium Limited, Office 205, 2 Queen Caroline Street, Hammersmith, London W6 9DX

Our new numbers as of 5th January 2016 will be:
02036572184 - Nick
02036572185 - Ian
02036572186 - Siddika
02036572187 - Owen

Trip rate calculations

TRICS® enables its users to undertake calculations, using a number of calculation parameter options, to ascertain potential levels of trip generation for a user-defined development scenario.

What are trip rates?
What are trip rates? Trip rates show the number of traffic/people movements in and out of a development (or an average of a number of developments within the same land use category), for a given trip rate parameter factor. For example, when trip rates are calculated by Gross Floor Area (GFA), they are shown per 100m2 of GFA. Using this factor, users can apply trip rates to potential developments, and are encouraged to achieve a balance between their selection criteria and the size of their selected data sample to achieve this aim.
  How are they calculated?
How are they calculated? Trip rates are calculated as follows: Mean average trip rates are calculated when there are at least 2 surveys included in a selected list (trip rates for an individual site can also be calculated). The calculation process consists of 3 parts, and these apply to every hour of the survey duration, for arrivals, departures and totals counts:

i Obtaining mean trip rate parameter figures

ii Obtaining mean traffic/people count figures

iii Calculating trip rates from the result of (i) and (ii)
(i) Obtaining mean trip rate parameter figures
Surveys at sites that have the necessary data available for a particular hour (those that include arrivals and departures count data for that time period) are used throughout this procedure. The GFA (for example) figures of the sites are added up, with the total GFA then divided by the number of surveys used, to produce the mean trip rate parameter figure (mTRP).
(ii) Obtaining mean traffic/people count figures
The same surveys used in stage (i) are also used in stage (ii), those being surveys that include arrivals and departures count data for a particular hourly period. The ARRIVALS figures from the selected surveys during the hourly period are added up, with the total number of ARRIVALS then divided by the number of surveys used, to produce the mean ARRIVALS count figure (mARR). The same process takes place for DEPARTURES and TOTALS (mDEP, mTOT).
(iii) Calculating trip rates from the result of (i) and (ii)
To calculate the mean ARRIVALS trip rate for a particular hour, the following equation is worked out:

(mARR / mTRP) X 100

This calculates the mean trip rate per 100m2 of GFA, and this figure is then shown on the trip rate calculation screen. The calculations for DEPARTURES and TOTALS are similar, as shown below:

= (mTOT / mTRP) X 100

This calculates the trip rate per 100m2 of GFA for a particular hour. Note that the calculation factor (100m2 in the case of GFA) varies, depending on the trip rate parameter used (e.g. PER 1 EMPLOYEE, PER 1 HECTARE, PER GOLF COURSE, etc).

NOTE: The trip rate parameter weighting factor: Care should be taken when compiling a list of surveys, as including a site (or sites) containing a much higher or lower trip rate parameter value than the rest of the selected set may lead to average trip rate figures being "weighted" more towards such sites. Comparisons between mean trip rate figures and the median figures in corresponding rank order lists (see below) can sometimes show a difference, as no "weighting" can occur when calculating a rank order list from each individual survey.

Trip rate graphs can also be viewed after calculations have been made. Graphs are a much more visual way of representing trip rate data, and are used to identify percentages of trips per hour as a proportion of the whole survey, as well as show periods of peak trip activity.

Trip rate rank order lists can also be calculated. A rank order list shows the trip rate value (either arrivals, departures or totals) for each individual survey included in the original trip rate calculation, with the survey with the highest trip rate shown at the top of the list. Rank order list trip rates are calculated for a given time period or the busiest time period for each individual survey in a selected set. This is a good way of comparing trip generation at different sites in a selected set, and for spotting any "weighting" factors amongst the selected surveys.

Note that from TRICS® version 4.5 onwards, trip rates for multi-modal surveys can be calculated for car occupants, public transport users, bus passengers, train passengers, coach passengers, pedestrians, and total people, as well as the standard vehicles count which is present in all TRICS® surveys. Also note that for surveys where OGV, PSV, Pedal Cycle and Taxi counts are available, trip rates can also be calculate by these.