Those are High Pressure sodium bulbs they are still made (so all the medical marijuana growers can stay in business)
Craig Matheny
Anaheim, Ca
45 watt Epilog Laser, 60 watt Epilog Laser,
Plasma Cutter, MiG Welder
Rikon 70-100 Lathe
Shop Smith V510, To many hand Tools and
Universal Repair Kit (1- Hammer and 1- Roll of Duck Tape)
The phillips bulbs that are yellow when off are fantastic. Lots of light, quite natural looking, and very little energy use. They are a little expensive, so I just wait for sales.
Paul
OK, but with very minor controls you could turn those heaters on when the temperature inside the housing dropped below freezing, and when the sun is beating on them even in winter, I bet that's a lot less time than even 1/3 of the year. Plus crews aren't having to change bulbs on a regular basis.
I'd be curious to know the details of the heaters they used... with all the other stupid stuff I see locally concerning traffic lights, I wouldn't be a bit surprised if the heaters stayed on constant all winter long. I certainly hope that isn't the case. There are so many ill programed traffic lights in all the cities here in the Shenandoah Valley, it isn't the least bit funny. Sensored lights that take multiple minutes to change when theres no traffic from the other direction, lights that change instantly for people coming of side streets that make a right turn and they could have simply made a right on red, etc, etc. I laugh in disgust when I hear the term "traffic engineer".
Your first clue that there's a problem is that everyone involved in traffic control (elected officials, police, engineers, construction workers, etc.) call a certain implement an "automatic traffic control device" or "automatic traffic signal". The rest of the driving public calls them, "stoplights".
Actually if I remember correctly back when I was doing electrical work for a living the light bulbs for traffic lights were rated at 130 volts were as a standard light bulb for your house is spec'd out at 120 volts. Since most houses average about 122 to 125 volts the light bulbs with the higher voltage rating will last much longer.
Just about every type of engineering has different names for objects. This doesn't mean engineers are bad just because they use different names for things than the public does.
I believe the main problem with traffic engineering is lack of money. Many major highway interchanges locally are diamonds due to lack of money to build a proper interchange. A road project currently under way has built some of the bridges for only two lanes even though there are future plans to go three lane. The project is under a very tight budget so I guess they decided saving a a million now is worth spending more money down the road to widen the bridges. The same project also eliminates a bunch of ramps to save money. Do you really think the traffic engineers would have eliminated those ramps if they had their way and the money to do it right?
The budget for the above mentioned project was originally $140 million and had all the bells and whistles and I think it even had new ramps that were missing when the highway was built years ago. Unfortunately, the project got pushed back until after 2030 due to lack of money. Someone decided around 2009 that the bridges in the area needed replacement and they had the money to do so. They came up with $40 million for the project. The project was totally redesigned and they cut it to the bare bones. The project will improve traffic flow, but not as nicely as the original project. Local residents are quite upset as the missing ramps mean tons more local traffic. They even widened an existing bridge over the highway to handle the extra local traffic.
I don't believe that was what he was saying at all.
I disagree. There are far too many examples of ill designed roadways and intersections that would have cost no more to have configured them correctly. And when it comes to stoplights being programed correctly, there is no additional cost. We as a nation simply need more people in those postions to give a damn about proper traffic control. I can't imagine that they don't drive the very roads in which they are responsible for the signals, and that they can't figure out that sitting 3 minutes for signal change for a sensored light that has no other oncoming traffic is a problem. Likewise, having one car roll up from a side street causing a light to change instantly, only to make a right turn that could have been made on a red light. A simple 30 second delay in triggering that light would move traffic way more efficiently.
Around here, one locality has even started programing lights to make the left turn a delayed green (letting straight traffic go first, then giving the left arrow) rather than an advanced green, but only for one direction. The traffic going left the other way get an advanced green. So you have traffic going south that gets an advanced green for left turns and the south bound straight thru traffic gets to go, then the left turn turns red, then the north bound straight traffic gets to go. Then the south bound turns red, and the north bound left turn traffic finally gets the green. It's absolutely the dumbest traffic light programming I've seen.
Agree 100%.
It seems amazing to me that with all the other advances in technology, we can't get the lights working better.
How much gas are we burning, as a nation, sitting at stop lights? Even small improvements in traffic control would yield huge savings in energy.
And they just installed a new stoplight near my home so trucks could make it onto a larger street more safely. But it seems to trigger if a squirrel wants to cross the street. I'm stopping there all the time, with no cross traffic in sight.
I really do think it is a "we don't give a carp" attitude, under cover of "you don't understand traffic control, this is how it should work."
Nonsense.
There are still a lot of traffic lights that don't even have loop detectors. Many of the signals in Downtown Minneapolis, Minnesota are still mechanically timed. You can hear the noises from the cabinet on the street corner. Most of them haven't been re-timed in years because it costs money. First they have to do a traffic study and then somebody has to analyze the traffic study to determine the proper timing. Public works is so underfunded we are lucky they haven't installed stop signs to save money on the electricity for the signals.
The city recently got a $16 million federal grant to put in a new computer system for traffic light control. Hopefully this means more loop detectors and new electronic timers for the lights.