Questions tagged [infrastructure]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
1 answer
70 views

Why were so Many Older Bridges Built so Low to the Water?

Why were so many pre-1970 bridges built so low to the water that they do not even allow a single-level stand-up boat (serving as water buses or small fishing/research vessels) to pass underneath ...
user avatar
-2 votes
1 answer
50 views

How are subsea HVDC cables laid without cutting internet cables

Apparently subsea HVDC cables are actually buried around 2m below the sea bed using some kind of plough-like device. How can that be done without cutting internet cables?
user avatar
  • 137
4 votes
1 answer
110 views

What is the cause of this cracking pattern in a simply supported beam?

Background On May 5th 2022, a bridge was struck in Brantford, Ontario, Canada by a commercial vehicle. This vehicle struck a reinforced concrete protection beam placed on the on-coming side for the ...
user avatar
  • 1,081
0 votes
1 answer
35 views

Why Not Refine Crude Oil At Source

It seems like refining of oil is often done far away from where the oil was initially captured and contained from the upstream source. Why? This is not an engineering question is it?
user avatar
1 vote
2 answers
101 views

Effectiveness of LiDAR in manhole structures?

I'm an intern at an electrical utility and I've been tasked with doing a proposal/cost analysis to evaluate whether or not starting a pilot with a company specializing in robotic inspections is worth ...
user avatar
0 votes
1 answer
76 views

Why have they stopped having curbs on streets? [closed]

Growing up, roads always used to have a clearly separated sidewalk with a height difference. All new streets I see have no such curbs/height differences. Instead, it's just one "blur" of ...
user avatar
11 votes
5 answers
5k views

Why are some public benches made with arm rests that waste so much space?

While watching a YouTube video today, I noticed this public/park bench somewhere in the USA: It looks strange to me the way the arm rests on each side are so far into the bench, wasting a rather ...
user avatar
  • 111
1 vote
0 answers
35 views

Why is there such a strong focus on 5G in context of remote surgery

Almost every time I see an article or advertisement on 5G, a reference is made to remote surgery. The point that is being made is that 5G has lower latency and remote surgery would be more practical ...
user avatar
0 votes
0 answers
32 views

Are gas distribution networks tree-like?

I was wondering, if it is justified to say, that gas distribution network graphs (primarily in Europe) are typically tree-like. By gas distribution networks I mean municipal and regional distribution ...
user avatar
3 votes
1 answer
52 views

Why culmination points in tunnels?

The shortest connection between two portals would be a tunnel with constant gradient. Why do long tunnels instead rise from both portals to a culmination point, introducing unnecessary steep gradients?...
user avatar
  • 131
3 votes
0 answers
144 views

How many Technical Rescue: Collapse Units are there in the US? [closed]

In a story about today's Miami bridge collapse, I saw this photo: In the upper left, there is a white box truck which seems to say "MIAMI DADE FIRE RESCUE / TECHNICAL RESCUE / COLLAPSE UNIT," even ...
user avatar
  • 139
5 votes
6 answers
241 views

Why don't public transport networks have more routes to each terminal?

When using public transport, we often need to change routes in the middle of the journey. These changes have costs – I can think of the following, but there may be more. If we're reading, working, ...
user avatar
6 votes
2 answers
200 views

Is there a way to reduce leaks and infrastructure damage when turning water on and off at the scale of city?

Cape Town, South Africa is experiencing an extremely serious drought, with estimates putting April 21, 2018 as the day that the city will be forced to shut off all municipal water supplies and begin ...
user avatar
1 vote
2 answers
387 views

Oil refinery pipeline direct to gas stations

I know major oil pipelines do exists either underground or under the seabed. However, these usually move crude/unrefined oil from refinery to refinery. Yet we don't have refined petroleum or gas ...
user avatar
  • 125
0 votes
2 answers
617 views

How is the energy production of solar and wind compared with the prospect of nuclear fusion? [closed]

I am trying to find reliable information and comparisons about the energy production of renewable energy technologies, specifically, how solar and wind alternatives compare to nuclear fusion. Why is ...
user avatar
0 votes
4 answers
131 views

How can one reliably prevent pedestrian access to a parking garage, but allow vehicular access? [closed]

Consider a typical private parking garage for a condominium or apartment building. There is currently a typical garage gate that opens and closes (slowly) to allow vehicles to pass safely through the ...
user avatar
4 votes
0 answers
115 views

How does a cable-laying ship retrieve a partly-laid cable?

I was reading an article in the press this week about a project to lay an undersea cable across the Tasman Sea. The ship had had to return to port for repairs and return to complete the job later. ...
user avatar
  • 41
3 votes
1 answer
247 views

Electricity generation via piezoelectric roads, stairways, is it plausible?

I've been wondering if roads and stairways laced with piezoelectric generators be a viable method in clean energy generation? I'm currently unfamiliar with all engineering aspects of ...
user avatar
  • 31
0 votes
1 answer
485 views

At what cold ambient air temperature will power lines fail?

I'm wondering just how cold it would have to be before electric power can no longer flow through overhead power lines. I know power lines generate a certain amount of heat just as a side effect from ...
user avatar
  • 495
10 votes
7 answers
4k views

Why do we pave roads instead of making them from removable parts?

If roads were made of removable parts, we'd probably have fiber cable internet everywhere by now I'd say. It'd be so much easier to install e.g. new electricity and water infrastructure and to ...
user avatar
7 votes
4 answers
4k views

Why do water mains break in the winter?

It may just be my perception, but it seems like water main breaks (at least in Pittsburgh PA) are more common in the winter during the cold weather. It may just that they are more news worthy in the ...
user avatar