arran
http://www.ryanair.com/site/EN/news.php?yr=09&month=mar&...
Check out the cartoon at the bottom. Definitely c)
Interestingly, in the UK (and probably lots of other places) we have average speed cameras at road works which limit people to 50mph pretty effectively, this results in everyone travelling the same speed with no overtaking. Anecdotally I've found this to work quite well at keeping the traffic moving.
Effective journalism is important to a democracy and it should be funded in as democratic manner as possible.
http://en.wikipedia.org/wiki/Luminous_efficacy#Examples_2
Prototype LEDs are reaching 130 lumens/watt, low pressure sodium regularly get 150 lumens/watt in production. The efficiency of the LEDs used is probably around 80-90 lumens/watt.
The money saving is probably coming from the lower maintenance costs whilst there is an increase in energy use.