Wellington road policing manager Inspector Pete Baird is a fucking halfwit then?

[carbonhed]

"Wellington road policing manager Inspector Pete Baird said most buses trundled along the Golden Mile at between 13kmh and 17kmh but getting hit by a 12-tonne bus "is like getting hit by a car at 140kmh".

An 80Kg adult getting hit by a 1.5 tonne car doing 140 kph would have their legs below mid thigh vaporised instantly followed by their face hitting the bonnet at the speed of fucking light and then approximately 60 kg of sausage meat slammming through the windscreen and into the lap of the stunned driver before he had chance to say "Oh Shit!"

This is absolutely nothing like getting hit by a bus doing between 13 and 17 kph... but hey it's alright if your too pigshit thick to understand this... because you too can be an Inspector in the New Zealand Toytown Police - Traffic Division. This fucking bozo gets to call the shots?

Rant ends.

http://www.stuff.co.nz/dominion-post...den-Mile-limit

[merv]

They might average 13 - 17 but those buses race along between stops - I doubt they stay below the 30 limit when I see them.

[bogan]

Dudes been reading too many physics textbooks about momentum. Turns out a 120mm kinetic energy penetrator round has about the same momentum too. Fuck, you could just go around nudging tanks with buses instead of using the expensive depleted uranium

[BMWST?]

"Wellington road policing manager Inspector Pete Baird said most buses trundled along the Golden Mile at between 13kmh and 17kmh but getting hit by a 12-tonne bus "is like getting hit by a car at 140kmh".

An 80Kg adult getting hit by a 1.5 tonne car doing 140 kph would have their legs below mid thigh vaporised instantly followed by their face hitting the bonnet at the speed of fucking light and then approximately 60 kg of sausage meat slammming through the windscreen and into the lap of the stunned driver before he had chance to say "Oh Shit!"

This is absolutely nothing like getting hit by a bus doing between 13 and 17 kph... but hey it's alright if your too pigshit thick to understand this... because you too can be an Inspector in the New Zealand Toytown Police - Traffic Division. This fucking bozo gets to call the shots?

Rant ends.

http://www.stuff.co.nz/dominion-post...den-Mile-limit

i spose he thinks that a 1 tonne car has to go 12 times as fast as a 12 tonne bus to get the same energy.He seems unaware that the snery released increases with the SQUARE ot the speed ie 2 x the speed 4 times the energy 4 times 16 times the energy etc

[pete376403]

I thought it would be pretty obvious - buses stay off the footpath, pedestrians stay off the roads (except at controlled crossings)

Police could always be out there issuing the survivors with tickets for jaywalking.

[Rhys]

I thought it would be pretty obvious - buses stay off the footpath, pedestrians stay off the roads (except at controlled crossings)

Police could always be out there issuing the survivors with tickets for jaywalking.

They wouldn't be able to write them quick enough

[Jantar]

"Wellington road policing manager Inspector Pete Baird said most buses trundled along the Golden Mile at between 13kmh and 17kmh but getting hit by a 12-tonne bus "is like getting hit by a car at 140kmh".

An 80Kg adult getting hit by a 1.5 tonne car doing 140 kph would have their legs below mid thigh vaporised instantly followed by their face hitting the bonnet at the speed of fucking light and then approximately 60 kg of sausage meat slammming through the windscreen and into the lap of the stunned driver before he had chance to say "Oh Shit!"

This is absolutely nothing like getting hit by a bus doing between 13 and 17 kph... but hey it's alright if your too pigshit thick to understand this... because you too can be an Inspector in the New Zealand Toytown Police - Traffic Division. This fucking bozo gets to call the shots?

Rant ends.

http://www.stuff.co.nz/dominion-post...den-Mile-limit

Damn those busses travel fast. In the past 12 months my average speed has been just a tad over 3 kmh. (27000 km in 8784 hours)

[Marmoot]

Mathematically he is close enough.
P1 = M1.V1 , P2 = M2.V2
If P1 = P2, then M1.V1 = M2.V2.
V2 = M1/M2 * V1

If the bus is "1" and the car is "2", then the car's hypothetical speed equals how many times the bus's mass (or most people incorrectly call "weight") is to the car's.

If an average car weighs 2000kg, a 12T bus weighs 6x that hitting you at 20kph would put a momentum equal that of a car travelling at 6x 20kph = 120kph.

For medium car with the weight is about 1500kg, the bus is about 8x the weight. Given that, saying 140kph is probably about right if the bus is travelling at about 17kph. Actually, 136kph to be exact.

[FlangMasterJ]

Mathematically he is close enough.

If an average car weighs 2000kg, a 12T bus weighs 6x that hitting you at 20kph would put a momentum equal that car travelling at 6x 20kph = 120kph.

For medium sports car, the weight is about 1500kg, which means the bus is about 8x the weight. Given that, saying 140kph is probably about right if the bus is travelling at about 17kph. Actually, 136kph to be exact.

I know what I'd rather be hit by, the number 83.

[flyingcrocodile46]

Mathematically he is close enough.
P1 = M1.V1 , P2 = M2.V2
If P1 = P2, then M1.V1 = M2.V2.
V2 = M1/M2 * V1

If the bus is "1" and the car is "2", then the car's hypothetical speed equals how many times the bus's mass (or most people incorrectly call "weight") is to the car's.

If an average car weighs 2000kg, a 12T bus weighs 6x that hitting you at 20kph would put a momentum equal that of a car travelling at 6x 20kph = 120kph.

For medium car with the weight is about 1500kg, the bus is about 8x the weight. Given that, saying 140kph is probably about right if the bus is travelling at about 17kph. Actually, 136kph to be exact.

That's all good and fine but I don't believe that equal damage will occur between the two scenarios. Perhaps you can get the same maths to work for the following scenario but I seriously doubt that any damage would occur to a pedestrian if a 4 billion ton bus ran into (not over) them at a speed of 1 metre per hour. Yet bullets weight FA and will go through an engine block in the right circumstances. I think speed has far more influence than weight.

[carbonhed]

Mathematically he is close enough.
P1 = M1.V1 , P2 = M2.V2
If P1 = P2, then M1.V1 = M2.V2.
V2 = M1/M2 * V1

If the bus is "1" and the car is "2", then the car's hypothetical speed equals how many times the bus's mass (or most people incorrectly call "weight") is to the car's.

If an average car weighs 2000kg, a 12T bus weighs 6x that hitting you at 20kph would put a momentum equal that of a car travelling at 6x 20kph = 120kph.

For medium car with the weight is about 1500kg, the bus is about 8x the weight. Given that, saying 140kph is probably about right if the bus is travelling at about 17kph. Actually, 136kph to be exact.

Ladies and Gentleman we have a potential Police Inspector!

[oneofsix]

I thought it would be pretty obvious - buses stay off the footpath, pedestrians stay off the roads (except at controlled crossings)

Police could always be out there issuing the survivors with tickets for jaywalking.

In Wellington City there are the Walk Wise wardens, part of the same company that has the contract for the Parking Wardens. They do give out tickets for jaywalking, even entering a pedestrian crossing without giving traffic enough time to react ($35 ticket in the stats from memory) so it would be a revenue gatherer for the WCC rather than a police resource drain. Last Meter Warden I saw was dodging traffic jaywalking across Victoria St between Manners and Dixon, last Walk Wise warden seen was jaywalking across Victoria St between Bond and Manners. But the Walk Wise warden would have been safer as they wear bright yellow jackets

The Math don't matter it is a sly way to make the golden mile a pedestrian and bus only zone but as they have to allow for council vehicles, delivery vehicles, CEO's limos and taxis they can't just ban cars so they are trying to make it uncomfortable for them.

[SMOKEU]

I think speed has far more influence than weight.

I'd have to say the same, since a bolt action or break barrel firearm does far less damage in terms of recoil than the object being hit by the projectile(s). Every action must have an equal and opposite reaction, and unless it's a semi auto, the action isn't going to absorb the force.

[huff3r]

That's all good and fine but I don't believe that equal damage will occur between the two scenarios. Perhaps you can get the same maths to work for the following scenario but I seriously doubt that any damage would occur to a pedestrian if a 4 billion ton bus ran into (not over) them at a speed of 1 metre per hour. Yet bullets weight FA and will go through an engine block in the right circumstances. I think speed has far more influence than weight.

You might find that actually the surface that momentum is distributed across makes a bit of a difference. The quick bullet is tiny. The slow bus is huge, and likely to hit 1000x more of your body surface during the impact.

(actually that was a number i pulled out of the air, but surely you get the idea?)

[bogan]

You might find that actually the surface that momentum is distributed across makes a bit of a difference. The quick bullet is tiny. The slow bus is huge, and likely to hit 1000x more of your body surface during the impact.

(actually that was a number i pulled out of the air, but surely you get the idea?)

It's more the delta V which does the damage, a bus can impart up to 17kmhr or near instantaneous delta V, and being 12 ton it will be pretty much the full 17. The car can impart up to 140kmhr of near instantaneous delta V, though being 1.5 ton it might only impart 120kmhr of that. Assuming the same acceleration time, the car must apply 7x more force. And thats isn't taking account the squidgyness of the collision, just assuming a perfectly inelastic smash up.