Crosssafe -Intro to HCI&UX CW2
Smart traffic light
CROSSAFE
Research about pedestrian traffic light system
There are 2 main types of pedestrian traffic light system in the Uk
Pelican crossing
People press button
the traffic lights change from green to red = signalling for drivers to stop
Wait
the traffic lights change from red to green = safe to cross
The green has fixed timings when green light flash = flashing amber light for the drivers signalling that they can proceed if the crossing is clear
Image from https://www.smartdriversnetwork.co.uk/crossings-lgv/
2. Puffin crossing - pedestrian user-friendly intelligent
similar to 1st one with 2 sensors
1 on top of the traffic lights (PCD – pedestrian crossing detector
2 PKD - pedestrian kerb detector monitors the pedestrian's presence at the crossing
These sensors detect if pedestrians are crossing slowly and can hold the red traffic light longer if needed.
If a pedestrian presses the button but then walks off, the PKD will cancel the request making the lights more efficient.
How does the timing come from?
The length of timingod each redestrain system derived from data collecting, analyzing and planning go into timing a light system and ensuring the smoothest traffic flow possible.
>> that might not correspond to the real world situation or the sensor on the puffin detect only the timing to reduce the waiting time for the driver not a pedestrain
Field research
We did direct observation at the following setting: Barrack Road, Newgate Street and Bigg Market
The route we took are shown in the figure below:
The data we collected includes photos and videos. We put the photos and screenshots of videos on the Miro and clustered and coded them.
Link of Miro: https://miro.com/app/board/uXjVPJhonYg=/
Analysis from field research
Problem
Foreigners may get confused with the direction they should look at .
Many people won’t waste their time to press the button or wait. They just cross when there are no cars.
When pressing the button, the system will process the length of time to wait- this is not relevant to the actual situation of the road. People sometimes have to wait while the road is empty.
People usually look at their phones whilst crossing so they pay no attention to the road.
Main concept of development:
A system that adapts to the real world situation
Reduced waiting time
Target to situate on the floor which is the main focus of people nowadays who usually walk while they text
Indicates to disabled people / blind people when they should cross- potentially more effective than just sound
Design version 1:
The current idea of functions:
Speed and distance sensor on the traffic road
A pole light on each side of the crossing indicates the orientation of the vehicle approaching, the side that the vehicle approaches would light up to warn pedestrians. There are icons of eye and arrow on the pole light for people to learn their function. They can project the text of ‘LOOK RIGHT’ or ‘LOOK LEFT’ on the ground in the middle of the crossing.
Floor vibrates ( indication for blind people to not cross)-- fun for children –in addition = sound playing to indicate crossing vs no sound playing for not crossing
Persona
Persona 1– Home person with visual impairment
Name – Bobby
Gender– Male
Age – 35
Occupation – Engineer
Hobby— gardening
Characteristics — Loss of all peripheral vision and also part of central vision; Always with his guide dog Stratch; Very careful when crossing the road
Pain point– don’t know when to cross
Persona 2– International student
Name- Xiao Mei
Gender- Female
Age- 22
Occupation - undergraduate student in accounting
Hobby - baking, nail colouring, cafe hopping
Characteristics - arrive Newcastle yesterday
Shy and nervous in new environment
Pain point - not used to the left-hand traffic of the UK
Persona 3- local people
Name- Angelina
Gender- Female
Age- 45
Occupation - lawyer
Hobby - writing / collects paintings
Characteristics - energetic and impatient, coffee addicted
Pain point - late to work because waste time to wait for empty road
don’t like many people on street
Usually text while walk
Scenario— Storyboard format +description
2 scenarios one before & one after
Scenario 1– Amaal
Scenario 2 - Xiao Mei
Before
After
Xiao Mei reached the pedestrian crossing opposite the school.
She stepped on the textile floor with motion sensors. When the motion sensors detected people, it would signal to the LED lights that were installed into the textile floor and change it to a bright red colour.
Xiao Mei stopped and waited when she noticed the red colour on the floor.
15 seconds later when the road was empty, the floor would turn to green colour and also the side pole facing pedestrian view on both sides showed a green sign with an eye and arrow pointing to the right hand.
Xiao Mei saw the sign on the pole. She realised that the roads in the UK are different from her home country and needed to be careful and double check while crossing.
Scenario 3 Yiwen
Local busy
Before design implementation
After design implementation
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