Fair Play
TRICS Best Practice
ulian McLaughlin & Nick Rabbets
RICS - An Overview
Powerful Calculation Tool
Over 2,000 Sites
Over 4,500 Surveys.
Over 200 Member Organisations.
air Play?
Developer
Council
Council
Develop
Using the most Up-To-Date
Version of TRICS
TRICS issued June and December each
2003(b) – Second half of 2003
2004(a) – First half of 2004
Proving Your Case
How was this figure arrived at?
What were the selection criteria?
How many surveys were included in the
nal data set?
What were the survey site characteristic
hings to Lookout For
Large Differential in Parameter Values
Exclusion of Sites for No Apparent Reas
Use of Optional Parameter Selections
Weekday Mixed with Weekend
Multiple Surveys from Same Site
Excessive Use of “Estimate” Feature
ite
owns
Develop
Peak Hours and Days
Do the figures supplied correspond to
hourly peaks or other durations?
Which day(s) were included in any given
data set?
DATA EVALUATION
NLY USE FOR PRELIMINARY FIGUR
Summary I
• Evidence of Site Filtering & Selectio
• Check Comment Boxes
• Use Older TRICS Sites With Care
• Clear Criteria for Acceptable Data
• High/Low Trip Rate Parameters
• Only One Survey Per Site
• Is Average Trip Rate Acceptable?
Summary II
• Genuinely “Worst Case Scenario”?
• Check “Parameter Summary”
• Examine Rank Order Lists
• Look for Weighting
• Test Rank Order List Scatterplots
• Have Original Trip Rate Calculation
Close
• Q&A
• LUNCH