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1

FYI, the overhang is called nosing. Stair nose is used to create a decorative finished edge on a stairstep or staircase The primary reason is aesthetics and cost savings--not UX. Like a door or window casing, the stair nosing covers the seam between two materials meeting--in this case the tread and the riser. While it may cost more in materials, ...


6

I've not done this before, but I am going to answer my own question because after reading each of the answers here, I found that I needed to dig deeper to find a definitive answer. Nosings offer multiple usability benefits The world's foremost expert on stair design seems to be John Templer, formerly Regents' Professor of Architecture at the Georgia ...


3

I guess @Mervin Johnsingh has already answered it with the facts and figures. I just wanted to highlight my experience and my thoughts automatic doors(Sliding). If there is a automatic sliding door, one expects it to open at a safe distance without decreasing the speed of walking(with doubts in mind if its going to open or not) Similarly, when one enters ...


7

As per the ADA guidelines,the recommendations for doors are Doors that snap closed quickly make it difficult for users, particularly those with disabilities, to get through safely. Doors with closers should take at least 5 seconds to move from the open position at 90 degrees to 12 degrees from the latch. Doors with spring hinges should take at ...


1

Where I live in Australia (a place very rarely affected by snow cover), speed limits are painted on the roads only when they change: Image from Teach Yourself Driving in Australia Regular speed limit signs are also posted both at the point where the limit changes and many times along a roadway as a simple reminder or for commuters that have joined a ...


4

This is conjecture as well but consider this analysis of stair climbing gait, specifically the transition from stage IV (Forward Continuance) → V (Foot Clearance) → VI (Foot Placement): In particular, note that while lifting the leading foot, the knee flexes more than the hip, thus causing the toes to have a net backwards movement. If you ...


9

Step size and security When they are well designed, they seem to prevent more incidents than what they cause. There's a lot of information in Pauls, Jake. "Relating stair nosing projection, tread run dimension, shoe geometry, descent biomechanics, user expectations, overstepping missteps, and closed-riser heel scuff missteps.". I've not found studies that ...


1

This is a very interesting question. and all the reasons you carried maybe reasonable but nothing related to the toes and heel ... it is all about human comfort. The comfort space to get you feet onto a stair is 30cm tread X 15cm raise, but the comfort space for your next step average from 26cm to 28cm more than that you will make an extra effort to reach ...


10

I am afraid my answer might not be considered as the definitive source as I am just quoting someone in a forum but the primary reason is to enable users to walk down steps better by providing more grip and space. To quote the post. For safety in going down the stairs. When you step down the stairs, you place the ball and toes of your foot on the tread ...


0

In Phoenix, we don't have the MPH written on the road in our highways, but we do have the highway that this is an exit-only lane for written on the road. For example, you're travelling on the 202W, and there's an exit for the 101N coming up. Before the exit, there's an on-ramp from another street and after that on-ramp (and before the exit) there's an ...


0

The lines are used with Gatso speed cameras as a secondary check of distance travelled. They are precisely laid in the road surface and the Gatso takes 2 pictures 0.5 sec apart. Whilst the Gatso will register the speed from the radar (and only trigger the camera if the pre-set limit is exceeded) the number of lines uncovered between the two pictures will ...


3

It facilitates reading the text in moderate traffic. If there are other vehicles on the road and you are following at a safe distance, you will read the closer text first as your view of the farther text will be blocked. This allows you to read the full message incrementally. Obviously this breaks down when there is no traffic and you have decent vision, ...


5

Extreme Environmental Conditions Similar to conditions in Finland, as shown by @locationunknown, locations in India suffer problems as well. Where monsoon damages roads every year. Imagine speed limits and other markings on road would never be seen on these roads. Other constraints here in India, why speed limits are not on road is the sheer ...


0

Apparently (I have been unable to locate the research), A UK study showed that in slow, dense traffic drivers would spend more time looking at the road surface directly ahead of their vehicle but in light, fast-moving traffic would spend more time looking further ahead. In the first case this would offer a lower view and the in the second a higher view. As ...


19

In complete agreement with the other answers, but to provide an alternate viewpoint: If you were driving at night, your headlights will reveal the beginning of the sentence before the end.


39

You read as you approach. Theoretically. In reality, levels of visual acuity mean that some people (like you and I) can read the whole block at once. Another reason that painting information on the pavement isn't always ideal. Here's a good visual for how this is designed to function in practice: The trick is (as the image above shows) the spacing of ...


5

I have bad vision. I can see well enough to drive, but if that message is more than a line or two, I won't be able to read the beginning of it before I've passed the end of it. They're written backwards for me.


0

A more technological solution would be for the speed limit to appear as part of a heads up display for the driver. This could enable the sign to be given extra emphasis when the speed limit is being approached or broken. More simply the car could just be fitted with a speed limiter that adjusts to the local restriction so that no speed limit signs would be ...


17

Do signs printed on the road offer a significant advantage for the user over signs on a post? Let's make a matrix: ------------------------------------------------------------------------------- | On Road | On Sign ...


21

Besides the snow-covered roads—a very clear reason but only applicable in a small number of cases—there are several vision-related explanations. The first one is simply geometrical. On an empty road, a traffic sign remains for a long time close to the centre of the driver's field of view (where vision is sharpest) and can be seen from far away. It gets off ...


3

Also, information printed on the road can only be read when there is little traffic, or at least no cars blocking it (or other obstacles such as weather as already previously stated). In rush hour, for example, your speed limit on the road would likely be missed by everyone. The same would happen even if you were driving at the speed limit and there was a ...


158

Here in Finland the main reason is this: Image source Road markings are used to denote speed limits but never as a primary mean. And as Jung Lee points out, re-applying road paint is labor intensive, especially here, as studded tyres usually erode most of the paint in one or two winters. Edit: The Finnish law actually states that road markings, such as ...


12

In addition to the ones mentioned by others, here are additional considerations: Road paint is more labor intensive to install initially. Road paint is more labor intensive to maintain as well because road needs to be repaved every few years and/or potholes filled. But more importantly, road paint is slippery in wet weather. (well known concerns among ...


10

Couple of reasons: When driving there are often cars ahead, so anything written on the road can be obscured. The same is true with street signs, but it's not nearly as bad. Drivers look forward and straight. Signs are usually off to either side of the road, where both a driver and passenger can see. Thus the signs are a little easier to view for all ...


37

I would say there are a couple of aspects here Line of sight : Though while driving your line of sight is mainly on the road, the main point of focus is at object ahead of you straight ahead (e.g. a vehicle going ahead). Hence writing the speed signs on the road would have to require the person driving to focus down and assimilate the information which ...


4

In U.S. English a "bagger" is the person who bags your groceries at the store. According to Google, other options are either a type of motorcycle, or construction equipment like a dredger or backhoe. Assuming you mean something like this: ...the answer is that they are not all yellow. In Japan, they're often gray & purple. Some are green, or ...


-1

The answer is ridiculously simple. You cannot make rounds from paper/cardboard. You cannot make squares from Aluminium/tin cans. With plastics, all is possible. Milk cartons are made from cardboard, therefore square/rectangular.



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