Myriad - Colour Conventions

(updated  31st August 2007)

Keywords: Pedestrian Evacuation, simulations, simulating crowds, simulating behaviour, simulating people

Myriad uses a metric (people per square metre) scale and the primary colours correspond to the Fruin Level of Service (see below)

Fruin Data - Walkways

Area (sq m)
Flow rate 
LoS A> 3.24 <23 pmm 
LoS B3.24 to 2.32 33 pmm 
LoS C2.32 to 1.39 49 pmm 
LoS D1.39 to 0.93 66 pmm 
LoS E0.93 to 0.46 82 pmm 
LoS F< 0.46<82 pmm 

Fruin Data - Stairs

Area (sq m)Flow rate 
LoS A> 1.85 <17 pmm 
LoS B1.85 to 1.39 23 pmm 
LoS C1.39 to 0.93 33 pmm 
LoS D0.93 to 0.65 43 pmm 
LoS E0.65 to 0.37 56 pmm 
LoS E< 0.37 <56 pmm 

Fruin Data - Queues

                       Area (Sq. Metres)

LoS A

 

>

1.21

Free circulation

 

LoS B

1.21

to

0.93

Restricted circulation

 

LoS C

0.93

to

0.65

Comfort zone

 

LoS D

0.65

to

0.28

No-touch zone

 

LoS E

0.28

to

0.19

The Body ellipse

 

Fruin Data - Platforms

Danger Level3.59 people per m2 
Jam Capacity 2.15 people per m2 
Desirable Max1.08 people per m2 

We use a specific colour convention in Myriad II to ensure that risk analysis is highlighted on maps, plans and diagrams. See below for further information.

We display this as an area graph to highlight the Levels of Service as a square area

By taking an area of 3 metres long and 1 metre wide we can display the above as a series of graphics (see below).

 

Level of Service A. Flow rate < 23 people per metre per minute

 

 

Level of Service B. Flow rate 23 - 33 people per metre per minute

 

 

Level of Service C. Flow rate 33 to 49 people per metre per minute

 

 

Level of Service D. Flow rate 49 to 66 people per metre per minute

 

 

Level of Service E. Flow rate 66 to 82 people per metre per minute

 

 

Level of Service F. Flow rate variable.