Slashdot is powered by your submissions, so send in your scoop


Forgot your password?
For the out-of-band Slashdot experience (mostly headlines), follow us on Twitter, or Facebook. ×

Comment: Re:The addresses are there... but still... (Score 4, Insightful) 271 271

It's correct to use assigned addresses for internal hosts. The point is they're unique — you can set up a tunnel between any two organisations, or merge two networks, and not have to renumber things because both were using 10/8.

The cost to renumber and use their assignment more efficiently would be huge, similar to the cost to move to IPv6 but with little gain.

Comment: Re:It's obvious how Uber does it (Score 1) 226 226

At least with Uber I know I'll be in a clean vehicle with a driver whose name and face are shown to me before I get in.

I used Uber for the first time on Satur^W Sunday morning in London, and although the registration number of the car was correct, the driver wasn't the one pictured. I assumed they were sharing a single car / account.

Is this uncommon?

Comment: Re: So, the other side? (Score 1) 422 422

I'm about to sign a contract for employment in a wealthy European country. It states upfront that severance pay is 2-6 months, depending on length of service. Balancing this, my notice period will be 3 months.

If the company can't afford to pay on these terms them it's going bust. They should have made these developers redundant 6 months earlier (or whatever) but instead took a gamble.

Comment: Re:It's the semi's that destroy the roads (Score 1) 837 837

Only for the products you buy, so why not charge the purchaser, rather than subsidising the transport of their purchases?

If goods you buy are transported by ship, you pay a tiny amount for the maintenance and fuel of the ship, but your neighbour doesn't.

Comment: Re: How does this help with collisions? (Score 1) 36 36

The last time a bridge collapsed in the UK due to a maintenence problem seems to be 50 years ago. I think we've got this one sorted...

(Bridges have been washed away by floodwater within the last decade, usually really old ones. If the river profile was changed by a land use change upstream, that could be blamed on inadequate processes.)

Comment: Re: Looking at a bridge from space is somehow bet (Score 1) 36 36

There are laser location sensors in several underground stations in London that have construction work nearby. One laser thing on a robot seems to routinely measure the distance to many fixed targets.

GPS isn't an option, so you could still be right that it's cheaper.

Comment: Re:and dog eats tail (Score 1) 393 393

$1000M for 9 miles of light rail isn't completely crazy (expensive, but believable). The average cost in the UK is £25M/mile ($40M), but Edinburgh's cost £100M/mile ($156M). A lot of the cost is moving whatever's buried under the road out of the way, to allow future repairs without disrupting the tram.

It's a lot cheaper to build something outside a city on worthless land, whether rail or road.

The 2009 cost per mile for building a 2+2 road in the UK was £13M, for a basic two-lane road £8M. Are you sure your final figure is correct?

(NB the British rail costs will include all appropriate safety systems. This article is interesting. It's over 8 years since a passenger on a train died in Britain, though some have died falling down stairs/escalators, off platforms etc.)

Comment: Re:No self driving trains? (Score 1) 393 393

There are four London Underground lines with Automatic Train Operation. There's even a Wikipedia category:

It's not 100% automatic, the driver has to press a button to close the doors, and another (I think) to tell the train "go when ready".

Comment: Re:former trucker here... (Score 1) 615 615

Fuel is the easy one -- the truck pulls into a fuel station, and the attendant fills it up. The truck company has a contract with the fuel station franchise.

Lots of journeys probably don't involve any complicated roads. Port or rail freight yard to supermarket distribution centre, from there to the out-of-town supermarket, etc.

Lead me not into temptation... I can find it myself.