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Japan

Started by mightyace, March 31, 2009, 04:53:00 PM

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bing101


Here is a city tour of Tokyo.


bing101


bing101


bing101


Cool tour of Chiba.


bing101


Here is another video from Kagoshima and from Tokyo.









bing101




Here is another tour.





bing101

Cool City tours in Japan.








bing101


Here is a tour of Osaka.




bing101


Here are some roadgeek tours from Japan.





bing101


Here is more from Japan.


bing101


Osaka Night drive.




bing101




Here are tours of Nagano and Tokyo.






bing101

Here is a tour from the area of the Olympics.


https://www.youtube.com/watch?v=DWOP3RPrnLk

bing101


mrsman

Quote from: bing101 on July 23, 2021, 10:53:46 AM
Here is a tour from the area of the Olympics.


https://www.youtube.com/watch?v=DWOP3RPrnLk

Unfortunately, I forgot the timestamp, but somewhere on this video, you see a six aspect signal where a red ball, green left arrow and green straight arrow are displayed.  It was a little disconcerting to see people proceed at full speed on a red ball, but obviously the red ball controls the right turn (against opposing traffic in Japan and other left side countries) and the green arrows control the straight and left movements.

jakeroot

Quote from: mrsman on August 08, 2021, 06:50:33 PM
Quote from: bing101 on July 23, 2021, 10:53:46 AM
Here is a tour from the area of the Olympics.


https://www.youtube.com/watch?v=DWOP3RPrnLk

Unfortunately, I forgot the timestamp, but somewhere on this video, you see a six aspect signal where a red ball, green left arrow and green straight arrow are displayed.  It was a little disconcerting to see people proceed at full speed on a red ball, but obviously the red ball controls the right turn (against opposing traffic in Japan and other left side countries) and the green arrows control the straight and left movements.

I'm noticing this right around the 21:00 mark.

This is basically how Japan does protected-only signals. Unlike American signals, however, the green arrows do not immediately mean "protected movement". As you can see in the video, left turns still have to yield to the crosswalk on a green left arrow. Of course, it may be that left-facing green arrows mean "movement in this direction permitted", not protected, apart from right turn green arrows (which are protected).

I do wish Japan would innovate a little in the signal area. The current setup is fine if there is no intent to ever use protected phasing. And to be fair, Japan rarely used protected-only phasing, even at double or triple right turns, so there was rarely a reason to innovate. But if they intend to make this more common, they should consider using maybe flashing yellow arrows or something. The current setup is a little awkward.

kernals12

So what keeps the Japanese from rioting over these outrageous tolls? Do they just accept that highways are expensive to build in a mountainous, earthquake-prone country?

Rothman

Quote from: kernals12 on February 16, 2022, 07:48:55 AM
So what keeps the Japanese from rioting over these outrageous tolls? Do they just accept that highways are expensive to build in a mountainous, earthquake-prone country?
Same reason we don't riot here.
Please note: All comments here represent my own personal opinion and do not reflect the official position(s) of NYSDOT.

westerninterloper

Quote from: Rothman on February 16, 2022, 07:54:42 AM
Quote from: kernals12 on February 16, 2022, 07:48:55 AM
So what keeps the Japanese from rioting over these outrageous tolls? Do they just accept that highways are expensive to build in a mountainous, earthquake-prone country?
Same reason we don't riot here.
Same reason we don't riot in the US for a lack of public transportation. We've become used to it, and there are alternatives.

It is far more economical to take the train in Japan for a single person travelling to almost anywhere in the country. Highways are mostly used by families on vacation (when the train becomes too expensive or crowded during holidays), buses and some delivery trucks. Rarely does a single driver commute by car over the toll roads; these roads are not meant to handle commuting like US highways.
Nostalgia: Indiana's State Religion

fwydriver405

Quote from: jakeroot on August 08, 2021, 10:22:30 PM
Quote from: mrsman on August 08, 2021, 06:50:33 PM
Quote from: bing101 on July 23, 2021, 10:53:46 AM
Here is a tour from the area of the Olympics.


https://www.youtube.com/watch?v=DWOP3RPrnLk

Unfortunately, I forgot the timestamp, but somewhere on this video, you see a six aspect signal where a red ball, green left arrow and green straight arrow are displayed.  It was a little disconcerting to see people proceed at full speed on a red ball, but obviously the red ball controls the right turn (against opposing traffic in Japan and other left side countries) and the green arrows control the straight and left movements.

I'm noticing this right around the 21:00 mark.

This is basically how Japan does protected-only signals. Unlike American signals, however, the green arrows do not immediately mean "protected movement". As you can see in the video, left turns still have to yield to the crosswalk on a green left arrow. Of course, it may be that left-facing green arrows mean "movement in this direction permitted", not protected, apart from right turn green arrows (which are protected).

I do wish Japan would innovate a little in the signal area. The current setup is fine if there is no intent to ever use protected phasing. And to be fair, Japan rarely used protected-only phasing, even at double or triple right turns, so there was rarely a reason to innovate. But if they intend to make this more common, they should consider using maybe flashing yellow arrows or something. The current setup is a little awkward.

Wonder if Japan, with the signals running protected-only phasing, if they run any kind of lead-lag phasing at all, and/or if they have any kind of yellow trap issues there?

In the video, it appears that their PPRT signals run the permissive phase first (yield on circular green), then run lag-lag operation before running phasing on the cross street. Not sure if Japan uses any kind of leading lefts at all with PPRT and/or if their signals are pre-timed (no gap-out if an approach is out of vehicles)...

In_Correct

Quote from: westerninterloper on February 16, 2022, 03:59:50 PM
Quote from: Rothman on February 16, 2022, 07:54:42 AM
Quote from: kernals12 on February 16, 2022, 07:48:55 AM
So what keeps the Japanese from rioting over these outrageous tolls? Do they just accept that highways are expensive to build in a mountainous, earthquake-prone country?
Same reason we don't riot here.
Same reason we don't riot in the US for a lack of public transportation. We've become used to it, and there are alternatives.

It is far more economical to take the train in Japan for a single person travelling to almost anywhere in the country. Highways are mostly used by families on vacation (when the train becomes too expensive or crowded during holidays), buses and some delivery trucks. Rarely does a single driver commute by car over the toll roads; these roads are not meant to handle commuting like US highways.

And because their systems have been in place for very long time. No reason to oppose.

In United States, there is often opposition to any Infrastructure Project, and costs can be expensive to build particularly a National Passenger Rail Network. It is one of the reasons why I welcome Beautiful Toll Roads and driving often on them.
Drive Safely. :sombrero: Ride Safely. And Build More Roads, Rails, And Bridges. :coffee: ... Boulevards Wear Faster Than Interstates.

jakeroot

Quote from: fwydriver405 on March 16, 2022, 03:25:12 AM
Wonder if Japan, with the signals running protected-only phasing, if they run any kind of lead-lag phasing at all, and/or if they have any kind of yellow trap issues there?

In the video, it appears that their PPRT signals run the permissive phase first (yield on circular green), then run lag-lag operation before running phasing on the cross street. Not sure if Japan uses any kind of leading lefts at all with PPRT and/or if their signals are pre-timed (no gap-out if an approach is out of vehicles)...

From what I can tell from the videos I've seen, signals seem pre-timed and not based on any sort of actuation, apart from by pedestrians at certain intersections (from research, "automatic walk" seems to be the norm).

To us, this seems really ass-backwards, especially for a tech-forward country like Japan. But they do have a few differences from us. First, the vast majority of right turns (across traffic) are permissive, even those with two or three lanes, and it seems assumed that, at these intersections, the solid green cycle will allow most traffic to turn. So, the green arrow, which again is at the end pretty much everywhere I've seen, is relatively short. So most intersections effectively operate with two phases, with a short green arrow at the end if necessary -- many junctions are fully permissive. Second, many areas have lots of pedestrians, so vehicle-actuated signals would get very annoying for pedestrians, so pre-timed signals seem to be preferred as a result.

All this said, I would really love to visit Japan and see for myself more about how everything works because these are all just my guesses from what I can see in videos and on Street View.

Plutonic Panda

Quote from: In_Correct on March 16, 2022, 03:57:52 AM
Quote from: westerninterloper on February 16, 2022, 03:59:50 PM
Quote from: Rothman on February 16, 2022, 07:54:42 AM
Quote from: kernals12 on February 16, 2022, 07:48:55 AM
So what keeps the Japanese from rioting over these outrageous tolls? Do they just accept that highways are expensive to build in a mountainous, earthquake-prone country?
Same reason we don't riot here.
Same reason we don't riot in the US for a lack of public transportation. We've become used to it, and there are alternatives.

It is far more economical to take the train in Japan for a single person travelling to almost anywhere in the country. Highways are mostly used by families on vacation (when the train becomes too expensive or crowded during holidays), buses and some delivery trucks. Rarely does a single driver commute by car over the toll roads; these roads are not meant to handle commuting like US highways.

And because their systems have been in place for very long time. No reason to oppose.

In United States, there is often opposition to any Infrastructure Project, and costs can be expensive to build particularly a National Passenger Rail Network. It is one of the reasons why I welcome Beautiful Toll Roads and driving often on them.
I'm starting to come around to tolled roads for the very reason they can circumvent the bullshit ass endless red tape the FHWA makes DOTs clear.

jakeroot

I noticed this junction in Tokyo has both vertical and horizontal signals. Horizontal in the standard places, vertical in the median (only installed recently):

https://goo.gl/maps/8X8phRdYX1C2cekH7

jakeroot

Does anyone here know anything about Okinawa?

I'm moving there at the end of this month. I've been doing a ton of research, but would love to know more if anyone can add anything.



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