The reasons for this are not fully understood, but congestion and safety are major factors.
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But the congestion and distribution problems showed signs of easing Monday, with 180 flights passing through the airport without delays, said Gen.
But deterring congestion will in many cases require charging more than the marginal social cost of motoring, and this will impose economic loss on society instead of stemming it.
But with traffic congestion and pollution growing, and infrastructure buckling, Bangkok may need more radical solutions than a monorail system.
It would not only reduce congestion but also air and noise pollution.
"Those embassies that flout the law of this country and misuse diplomatic immunity to avoid the charge are enjoying the benefits of reduced congestion but contributing nothing, " said a spokesman.
BBC: NEWS | UK | England | London | Embassies suspend paying C-charge
In fact at ten-to-nine in term time around 20% of traffic on our town centre or city roads is actually on the school run and this causes enormous problems - not only in congestion but also in terms of safety around the school gates.
The Jordanian government wants to open at least two new camps to ease the congestion, but there's no funding.
Mr Green says the RUA does not oppose road congestion charging but believes it must be fair, reasonable and not just another tax.
Not only are they faced with rising gas prices and traffic congestion, but would-be car owners must now participate in a lottery to even purchase their dream vehicle.
Some fans set off from London very early in the morning on Saturday to avoid the motorway queues, but still reported heavy congestion at service stations along the route.
It not only puts them in harm's way, but it adds to the congestion.
But the key benefit of congestion tolling is its positive impact on the environment.
Diplomats were settling congestion fee bills but now their offices are inside the charging zone, they have stopped paying.
BBC: NEWS | UK | England | London | Embassies suspend paying C-charge
The expansion at Stansted arguably fostered the low-cost airline industry by offering it cheap landing rights there but it failed to relieve congestion at Heathrow.
The sites are great resources, but many suffer from Net congestion.
Ministers know they need to switch the burden of tax from fuel to direct charges such as motorway tolls or urban congestion charging, but fear voters' reaction.
Some of the benefits are well-known, such as the lack of Vehicle Excise Duty and exemption from the London congestion charge, but it's becoming easier to charge up a Nissan LEAF on the move with more public charging points opening all the time.
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You know where you want to go, but the incomprehensible road signs, congestion, construction delays and the like make it extremely difficult to get from here to there.
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Scottish Labour transport spokesman Des McNulty offered "constructive" support to the abolition of tolls on the Forth and Tay bridges, but stressed the need to tackle congestion and address the requirement for a new Forth crossing.
BBC: A timescale for scrapping the tolls has yet to be set out
The car dealer at Mitsubishi tried to explain how rapidly the car would pay back the initial cost in saved petrol and congestion charge costs - but how many motorists will swallow that when they could get two or three petrol cars for the price of an electric vehicle?
But all motorists would benefit from less congestion, a better environment and improved public transport.
But because of old systems and heavy congestion, it still takes too many products too long to cross our borders.
For example, spreading the same number of journeys over a greater period of time through trading across may well bring the benefits of easing congestion at peak times, but roadside residents will not be grateful when traffic noise and vibration start earlier in the morning and continue through the night.
Urban car use creates more congestion than rural car use, but petrol taxes do not distinguish between the two.
As cities reach into their pockets for transportation funds and pull out nothing but the lining, revenue-generating, congestion-busting options are going to become politically tolerable.
After all but promising to freeze the city's congestion charge for a decade in 2003, he raised it by 60% this year.
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Because of their relative proximity, the three airspace cylinders affect one another significantly, which creates congestion not just because of volume but because pilots have to thread the needle and fly needlessly intricate approach routes in order to comply.
You can introduce some search and congestion effects to get higher unemployment but the increase should be relatively mild, as you have to remember that the opposite effect should be occurring in the high skilled market and low skilled folks be dropping out.
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