59
votes
8answers
13k views

Why do traffic lights have three separate light bulbs instead of having one?

Recently, I checked out a concept design for a traffic light with only one light. Do you know the exact reason for having three lamps in a row, instead of one like in this concept?
15
votes
4answers
941 views

What's the optimal seat arrangement for a self-driving car?

Take your average mid-sized sedan layout (though this is the view of an SUV, it should illustrate the idea for anyone who has never been in a car before.): You have a driver's seat and a ...
7
votes
4answers
2k views

Why do some cars have the fuel door on the passenger's side?

Many cars, such as the BMW M3 pictured below, have their fuel door on the passenger's side of the car. I do not understand the reasoning behind placing the fuel door opposite the driver; placing it ...
2
votes
4answers
305 views

Thermostat UIs make me guess and think too hard

Every digital thermostat panel I've come across - just HORRENDOUS! There's a temperature display. Fine. There's an up and down arrow. First thought, it's to change the temperature. Good. There's the ...
4
votes
1answer
211 views

Is there any attempt to standardize a “cancel” action in elevator buttons?

I live in a country where only a few (I've heard of 2 or 3) elevators has the option to toggle back a pressed button in order to cancel the request. Of course, I'm waiting for all elevator buttons ...
27
votes
7answers
2k views

Why don't chinese teacups have handles

I am mystified over the difference between an English tea cup and a Chinese tea cup. The difference is that a chinese teacup does not have a handle/"ear" while an English teacup does have a ...
26
votes
4answers
2k views

Why are normal water coolers so low?

A lot of water coolers look like this: You usually have to bend down in order to place your glass under the spigot and fill it, which is annoying it if you're doing it more than a few times a day, ...
2
votes
1answer
276 views

Why are switches with light indicator common but outlets are not?

Wall mount light switches that have a neat light indicator that turns on when the switch is in "off" position are quite common. The purpose is to make finding the switch in the dark easier. Looks ...
15
votes
7answers
884 views

Is a book more user friendly than an e-book?

Lately I've had this thought that books were more user friendly than applications. Why do I say that? Because of these reasons: You can visibly see, at a given time where you are and how much you ...
2
votes
2answers
414 views

Method for usability testing of physical products

I am looking for a methodology for interaction testing of a physical product / interface. I am thinking something like expert testing (Heuristics) but just not for digital interfaces. Are there any ...
71
votes
9answers
7k views

Why is the “Record” icon always round and usually red?

I've been wondering why the symbol for 'record' is universally (AFAIK - has anyone seen exceptions?) a circle and usually red. Cameras, VCRs, voice recorders, smartphones, web apps... I've seen cases ...
6
votes
12answers
2k views

Why do physical keyboards still have built-in numpads?

Normally I use a wireless keyboard without a number pad and a mouse right next to it. Having started a new job, I was finding my right arm somewhat more sore. This was confusing until I realized: ...
19
votes
12answers
1k views

Why are child-resistant packages sometimes easier to open by kids than adults?

Based on discussions with friends and colleagues there seem to be difficulties opening child-resistant packages in general. There are even stories of parents letting their kids (supervised) open child ...
12
votes
4answers
556 views

Why are sinks always rounded?

I've noticed a trend recently that some sinks have a flat base, but they seem to be few and far between. Are there any reasons related to UX for why sinks have traditionally always been round?
16
votes
7answers
1k views

Why are AC adapters (wall warts) designed to block adjacent AC outlets?

The AC adapters for a lot of equipment seem to be specifically designed to block the AC outlets around it (this is in the US). Is this a safety feature to minimize the power to that outlet or just ...
7
votes
5answers
632 views

How useful is this coffee cup “hot contents” warning?

I came across this on Dan Pink's blog. This caption on a coffee cup is supposed to serve as a warning sign to caution people that the coffee is hot and care must be taken to avoid burns. The ...
4
votes
2answers
135 views

Conditioning users

Playing around with my heat in my new vw gti ;), I noticed when you press the heated seats button once, it's starts you off with maximum greatness (3 / 3) press it again it goes down ( 2 / 3) (1 / 3) ...
10
votes
1answer
950 views

Dice and Domino Dot Convention

I noticed dice and dominos both use the same convention for dot placement. Is there a reason for this? Is there any research on how to layout dots so that they are most readable?
-3
votes
2answers
107 views

How to create effective experiences/emotion to change punctured tyres for a car? [closed]

Keeping climate, location and gender into consideration, the mechanism of changing punctured tyres have not seen greater changes? Still it takes energy,effort and time, moreover awful experience ...
8
votes
6answers
1k views

Why is a manual transmission so complicated? [closed]

While driving I noticed that the gearbox is complicated for a first time users. I find it hard to tell which gear my car is in while driving. Is there a reason for this design, and is there a better ...
16
votes
5answers
3k views

Why do light switch buttons have up/down direction when it's really a toggle function?

If you do a quick image search on your favorite search engine on "light switch" you get a large number of images. Most of them have up and down direction, to represent state. Up for on in the US, and ...
13
votes
5answers
725 views

Why do Juice cartons fail on opening?

When I open a simple juice carton I fail on opening. I always seem to waste some of the concentrated juice on the kitchen sink and I wonder – do I do it wrong or is it the package that does not have a ...