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Old December 3rd, 2017, 09:32 PM   #15081
ChrisZwolle
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If there are too many destinations, they will split it up onto two signs. This is fairly common with roundabouts as only 2 destinations per branch will already fill up the sign. (6 is considered the maximum amount of destinations on any one sign).

Unlike traditional motorway signage, where motorists often only have to decide between two possible routes, roundabouts usually have at least three routes and possibly more (as in this case).

Additionally, the size of the sign may also be an issue with roundabout configurations. Normal 'fork' signs would have two arrows, ahead and right. A roundabout needs a sign with destinations left, right and ahead. That would result in a huge sign (with wind resistance becoming an issue). So they are usually split up onto two separate signs.
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Old December 4th, 2017, 03:26 PM   #15082
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A2/A9 knooppunt Holendrecht

The new configuration at the Holendrecht motorway interchange is now in use, including the new long flyover.

But they had to do an emergency repair this morning because some of the asphalt came loose. It was a bit wet and cold for paving operations.

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Old December 4th, 2017, 06:33 PM   #15083
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Quote:
Originally Posted by ChrisZwolle View Post
There are plans to upgrade provincial road N247 in North Holland province. Several variants have been made for the crossing at the town of Broek in Waterland.

The most extensive variant is a four lane tunnel with an 80 km/h speed limit:
BUILD IT!

Anything less in that than place will be rubbish and a waste of efford.
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Old December 4th, 2017, 09:01 PM   #15084
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A27 Merwede Bridge

In October 2016, the Merwede Bridge of A27 at Gorinchem was closed for all trucks due to emergency repairs.

They published an evaluation of the decision making and crisis management. I won't go into detail about that, but the facts leading up to the closure are interesting.

Due to the planned expansion of A27, a bridge inspection programme and static calculations started in 2016. It was already known that the bridge wasn't in a great condition and trucks over 50 tons (convoi exceptionnel) would have to be banned.

Bridge inspections were performed in early October 2016. On 10 October, at 23:00 hours, a bridge engineer of TNO calls up the Rijkswaterstaat engineer responsible for maintenance, with the news that one connection is in very poor condition and that a truck ban may need to be in place before the morning rush hour. They decided that there was time to do additional static calculations before traffic management would have to be in place.

The engineer at TNO performed a crack growth analysis. The results are in at 1:30 a.m. and shows that the connection has a safe service life of only six days. Because it was not known if that connection was inspected and calculated on 10 October or earlier, it was decided to take no chances and immediately ban all truck traffic before the morning rush hour. The risk for deformation and subsequent collapse of the bridge was too great.

Traffic management was then called up to get the truck ban in place before the morning rush hour. They had to install signs. Initially, signs banning vehicles over 3.5 tons were installed. They found out these could not be legally enforced without a portable weigh station on scene. They then installed general signs banning all trucks and buses. This had a significant impact due to the high truck volume on the bridge: 18,000 trucks per day.

With the trucks banned, the repairs could start immediately. They also had to finish inspections on less critical parts of the bridge. The bridge reopened to all truck traffic on 9 December after a 2 month closure.
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Old December 5th, 2017, 10:08 AM   #15085
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I'm no expert, but it seems unlikely that static calculations can give failure times so precise as "six days". To me, it sounds like trying to predict earthquakes...
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Old December 5th, 2017, 10:20 AM   #15086
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Yeah, it is really strange prediction. There are no such exact formulas in usual statical equations. Also there is quite big safety factor included usually.
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Old December 5th, 2017, 02:47 PM   #15087
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Evidently they can calculate how fast a crack grows given the input of traffic volumes, speed, etc.

It seems like it was a fracture critical connection of the bridge, I haven't seen any photos of what it is exactly.
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Old December 5th, 2017, 02:54 PM   #15088
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Rotterdamsebaan, The Hague

Late November aerial photos of the 'Rotterdamsebaan' project in The Hague.


Sfeerimpressie Knooppunt Ypenburg – eind november 2017 by Rotterdamsebaan, on Flickr


Sfeerimpressie werkterrein Vlietzone – eind november 2017 by Rotterdamsebaan, on Flickr


Sfeerimpressie werkterrein Binckhorst – eind november 2017 by Rotterdamsebaan, on Flickr
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Old December 7th, 2017, 08:54 AM   #15089
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Map of the Dutch roads in metro style.
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Old December 7th, 2017, 02:44 PM   #15090
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Quote:
Originally Posted by Theijs View Post
Map of the Dutch roads in metro style.
I see it is not really up to date.
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Old December 7th, 2017, 05:44 PM   #15091
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traffic safety

The share of traffic fatalities, sorted by speed limit.

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Old December 8th, 2017, 08:37 PM   #15092
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Regional agreements have been made to fund road projects and start procedures / studies for new projects.

For an official study to start, 75% of the estimated required funding must be reserved in the infrastructure fund. This prevents them spending money to study projects which have no funding in place.

* € 430 million has been reserved for the A2 expansion between Deil (A15) and Vught (A65). This is currently a six lane motorway (with 8 lanes around Den Bosch). It is expected that the actual expansion will focus on the Deil - Empel segment, which has two major river crossings that cannot be expanded (no shoulders). The total cost is estimated at € 570 million.

* procedures will start to expand A58 between Tilburg and Breda. An official decision will be taken in 2018. The cost is estimated at € 70 million, this is a simple widening across the median.

* a study will start in 2018 for A15 between Papendrecht (N3) and Gorinchem (A27). Funding has been raised to € 330 million.

* procedures will start in early 2019 to expand N50 to 2x2 lanes at Kampen. This is a cheap project but funding was removed in earlier budget cuts.

* a study will start in 2018 for A28 between Amersfoort and Zwolle, which is shown to become a bottleneck in the national capacity analysis.

* € 12.5 million will be available for the N35 upgrade at Raalte.

These are in addition to many other projects which are already funded or in study.
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Last edited by ChrisZwolle; December 8th, 2017 at 08:43 PM.
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Old December 8th, 2017, 10:46 PM   #15093
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What is the plan for Raalte? There was already something about replacing a traffic light by a viaduct. Is that this or is it something new?
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Old December 8th, 2017, 10:57 PM   #15094
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They plan to replace a traffic light with an overpass, evidently with 4 lanes but not much details are actually published. They also plan to build a tunnel for N348 under the railroad, which makes this plan rather expensive (some € 50 million total). Raalte is quite a bottleneck during rush hour with frequent 10 - 15 minute delays.



N35 was built mostly during the 1950s with design standards of the time, which means a single lane for through traffic at three traffic lights, driveway access, crossovers, etc. They worked when traffic volumes were around 5,000 - 10,000, but today it carries up to 20,000 vehicles per day. € 15 million is budgeted for local safety improvements (such as building new intersections and service roads).

The long-term plan calls for a four lane, 100 km/h expressway between Zwolle and Wierden. So far the following projects are in development;

* Zwolle - Wijthmen: under construction, will open 2018
* Wijthmen - Raalte: no plans other than local safety improvements
* Raalte: apparently only the west side is under development.
* Raalte - Nijverdal: no plans, though calls for a bypass of Mariënheem
* Nijverdal: a new tunnel has been built to bypass their main street
* Nijverdal - Wierden: currently in procedure. The draft EIA was signed last month.
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Old December 8th, 2017, 11:37 PM   #15095
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The first measurable snow of the season fell in the Netherlands today. They have forecast more serious snowfall on Sunday, with up to 10 centimeters.

Here's A9:


According to this website: https://rijkswaterstaatstrooit.nl/ they have not treated A9 over the past six hours which seems odd.
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Old December 9th, 2017, 12:57 PM   #15096
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A1, A12 and A50 in the Arnhem / Apeldoorn area have completely iced over after some 10 - 15 cm of snow fell.

They are going to battle the ice with this 'lava storm'. It has a plow, a broom and a hot brine mix sprayed onto the pavement. It can also spray under vehicles. It is specifically designed to battle sheets of ice.

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Old December 10th, 2017, 03:03 PM   #15097
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A4/A12 Knooppunt Prins Clausplein

Snow has made it impossible for traffic to climb one of the direct connectors at the Prins Clausplein Interchange near The Hague.

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Old December 11th, 2017, 09:47 AM   #15098
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Was fun on the motorway yesterday. Average speed being 50kmh max, with some stretches as low as 25kmh. Spotted a lot of snow ploughs, however it's stunning to see how bad some drivers handle the snow.

90% really handle it well, driving convoy style on two lanes at 40/50/60 depending conditions. However being overtaken by cars doing 100 in the left lane (uncleared) with 10cm with snow still on the car are the other 10%, those people should really see their licences revoked.
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Old December 12th, 2017, 12:52 AM   #15099
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I've also seen people driving over the normal speed limit here within the city while whatsapping. With this slippery slow. Either they are suicidal, or idiots or just loving manslaughter. I really don't know how, but apparently they were able to reach a biological mature age with that kind of behaviour.
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Old December 12th, 2017, 07:14 AM   #15100
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A few pics from yesterday afternoon.
Although the trip from Alexander in Rotterdam to The Hague took was slow the traffic was generally moving well at between 20-50kph. Only at Rijswijk/ Plaspoelpolder did the traffic become stationary.

Hoofdweg, Alexander, Rotterdam


A13, Overschie


A4, Plaspoelpolder
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