Questions tagged [roadway]
23 questions
20
votes
2 answers
Why are earthfills fully covered in concrete where they join bridges?
Here's how a typical earthfill carrying a roadway joins a typical bridge
Parts of the earthfill slopes are greenish - that's grass - and parts are whitish - that's concrete.
The earthfill slope is fully covered in concrete where it joins the bridge…
sharptooth
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12
votes
2 answers
Why do earth cuts sometimes have steps on their walls
A neat image from Wikipedia:
There're clearly visible steps on the cut wall. This makes the cut wider at the top and so requires more work so those steps have some serious reason behind them.
What's the purpose of these steps?
sharptooth
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10
votes
7 answers
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 maintain them if roads where made like that. We'd be…
Yuri Borges
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6
votes
1 answer
Does passenger car traffic actually damage roads?
Pavement Design
In roadway pavement design, the (US) controlling design load is usually the Equivalent Single Axle Load (ESAL). This number attempts to quantify how much bending stress a given vehicle causes in the pavement. Trucks have a much…
hazzey
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5
votes
2 answers
Term for double slope from street
One of the places I frequent recently had the curb and sidewalk rebuilt by the city. Previously, there was a roughly continuous transition from the street to the rest of the private drive next to the building.
After the rebuild, the sidewalk was…
user16
3
votes
4 answers
Speed breaker design
Speed breakers are safety devices that keep check on the fast-moving traffic. But
what does the speed breaker do when the vehicle is already slow approaching.
Is there any better breaking system design approach which keeps the fast-moving vehicles…
John
- 87
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3
votes
2 answers
Tiled/block pavement used to pave high traffic roadway?
We're normally paving the high-traffic road with concrete or asphalt. While for sidewalk/garden, we use pave block/tiles (either concrete or else)
Common reason is because pave block/tiles doesn't seems comfortable for high speed vehicle, because it…
gijoe
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3
votes
3 answers
Are crushed cement stones and additional digging necessary when repaving a road?
These days the city is repaving the main road close to my office. Looks like the rainwater drainage system is being upgraded and curbs and drains are added to manage the flow of rain water. Few casual google searches helped understand some of basic…
Mahendra Gunawardena
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3
votes
1 answer
Does rain cause Tarmac / asphalt pot holes? If so, how?
Does rain cause Tarmac / asphalt pot holes? If so, how?
After a period of rain in my city there are plenty of fresh new pot holes in the Tarmac / asphalt surfaces. The immediate cause is obviously axle overloading, due to appalling regulations, but…
Samuel Russell
- 131
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3
votes
1 answer
Street Light Arrangement Method
Hello I am a high school student and I am curious about how street light is arranged along the road. Is there government laws to install street light on the road or is the arangement of the street light that is the most efficient to its road? If it…
JSChang
- 31
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3
votes
1 answer
Vehicle load factor discrepancies
I am doing research on the impact of vehicles on roadways, specifically garbage trucks. In my research I am finding largely different "answers."
For example "Using American Association of State Highway and transportation Officials (AASHTO) vehicle…
ndstate
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1
vote
1 answer
Can Pavement ME Design be used to other areas besides USA and Canada?
I live in Asia and would like to use Pavement ME Design for my research. Can the current version of ME Design be used for that? Please give me the answer.Many thanks in advance.
Saowanit Prabnakorn
- 11
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1
vote
1 answer
Are storm drains put after road has been finished and asphalted?
Local government has been doing main capital city road reconstruction for a year now (had to be done in 3 month originally, but it is out of budget and out of time as usual).
They have finally opened it few month ago.
But now they are closing it…
sandrodz
- 111
- 2
1
vote
2 answers
Banking progression in NASCAR tracks
the Bristol Motor Speedway is 0.533 mi long racetrack. The road is banked and circular. The straights are banked to 6–10° and turns to 26–30°. I have made a small diagram for ilustration.
Before the cars fully enter into the turn, they have to pass…
Marino
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1
vote
2 answers
NASCAR corners on public roads
Why don't engineers build highways with corners such those on NASCAR speedways?
Marino Klisovich
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