Safe Overtaking

[Blackyv]

and just to add on, only kuku driver will purely base on the front car brake signal to react..... should be as front as possible (2, 3 or even 4 cars or more if within view..) to anticipate the needs to release acc or brake...

[Nzy]

Err...sorry but WRONG.

 

It is not braking that matters but reaction time.

 

The average driver takes 1.5 seconds between seeing the brake lights of the car in front, and depressing his own brake (0.75 secs to recognise and decide on action, 0.75 secs to move foot and push brake)

 

At 100 km/h you are travelling at 41.66 m per second [(100 km/h x 1000m per km)/3600 seconds per hour]

 

1.5 x 41.66 in my math = 62.5 m....how many car lengths is that?

 

Ur calculation got error. 100km/h is 27.7m/s. So 1.5x27.7 is 41.6m.

[Nzy]

and just to add on, only kuku driver will purely base on the front car brake signal to react..... should be as front as possible (2, 3 or even 4 cars or more if within view..) to anticipate the needs to release acc or brake...

I think he is discussing about in theory. Like my cousin's case also. If he had followed the 2s rule he would not have hit the car infront. For him there was no other car to watch infront. It was a branch that had fallen off a lorry and the car infront trying to avoid hitting it.

[Thedream]

Doesnt seem to have any problem. Cuz after that accident he sent for repair they checked everything and the brakes were ok. Maybe the abs never work properly cuz there was a screeching sound. Like as if the tires locked up intermittently.

 

There you go. Even you suspect that there was a problem with the ABS

[Darryn]

Sorry A but if I understand is like this

 

1. CAR A ONEcarONEcarONEcarONEcarONEcarONEcar CAR B unspecified gap CAR C (TS)

 

THEN IT BECAME

 

2. CAR A ONEcarONEcar CAR C (TS) ONEcarONEcarONEcar CAR B

 

Then what if CAR A JAM BRAKE ....CAR B

 

Sure Kiss backside! where got 20+ metres enough time to react? At 100 km needs over 60m....

 

Car C is a dangerous driver.

[Darryn]

Ur calculation got error. 100km/h is 27.7m/s. So 1.5x27.7 is 41.6m.

 

Apologies...double multiplied..

 

anyway, still stands, 42 m is how many car length? 6-7 yes?

[LeftRighty]

Sorry A but if I understand is like this

 

1. CAR A ONEcarONEcarONEcarONEcarONEcarONEcar CAR B unspecified gap CAR C (TS)

 

THEN IT BECAME

 

2. CAR A ONEcarONEcar CAR C (TS) ONEcarONEcarONEcar CAR B

 

Then what if CAR A JAM BRAKE ....CAR B

 

Sure Kiss backside! where got 20+ metres enough time to react? At 100 km needs over 60m....

 

Car C is a dangerous driver.

 

What makes CAR A "JAM BRAKE"? /scratch head

[LeftRighty]

Apologies...double multiplied..

 

anyway, still stands, 42 m is how many car length? 6-7 yes?

Not really. Unless front car defies law of physics and comes to an instant stop. Or a tree falls right across the road. Or the ground caves in.

 

But I get what you are trying to say. Don't disagree with you.

[Nzy]

Apologies...double multiplied..

 

anyway, still stands, 42 m is how many car length? 6-7 yes?

 

Average length of a car is around 4m. So 42m is around 10 car lenghts?

[Nzy]

Not really. Unless front car defies law of physics and comes to an instant stop. Or a tree falls right across the road. Or the ground caves in.

 

But I get what you are trying to say. Don't disagree with you.

 

I think u misunderstand the calculation he did. Cuz if at 100km/h u take 1s to react. U would have travelled 27m more than the car infront of u before stopping. So if u leave a gap of exactly 27m. In theory by the time both cars stop the gap between both cars should be 0m. But thats if both cars have exactly the same stopping distance.

[Blackyv]

Sorry A but if I understand is like this

 

1. CAR A ONEcarONEcarONEcarONEcarONEcarONEcar CAR B unspecified gap CAR C (TS)

 

THEN IT BECAME

 

2. CAR A ONEcarONEcar CAR C (TS) ONEcarONEcarONEcar CAR B

 

Then what if CAR A JAM BRAKE ....CAR B

 

Sure Kiss backside! where got 20+ metres enough time to react? At 100 km needs over 60m....

 

Car C is a dangerous driver.

 

 

i can understand ur scenario but in reality, under such situation, very likely CAR-B would be lifting the acc seeing CAR-C slotting in-between by judging the gap has narrowed....... anyway, if the gap is too narrow due to car-c slot in and at that very moment, sudden jam brake due to whatever reason, yes, car-c are screwing car-b up.... ....

 

actually, that's what happen to a red-plate driver who kissed my back.. morning peak hour on SLE to BKE slip road, always jam and many Q jumper as usual.... this civic cut Q abruptly and i brake (actually, not very abrupt to warrant an E-brake.. just slight hard braking...) and bang... someone kiss my back.... but minor bumper dent, settle with $100+ only and case closed...

[LeftRighty]

.... But thats if both cars have exactly the same stopping distance.

Exactly isn't it? Like I said, I get what he is trying to say, but it doesn't work that way on the roads.

 

Even if you keep 20 car lengths, you are not safe if you keep your eyes just on the other car's ass.

 

Same goes for overtaking. If you can't visualize and anticipate what the other cars around you are going to do, then it isn't safe to overtake. Doesn't matter if it's half car length or 20 car lengths.

Edited October 23, 2010 by LeftRighty

[Darryn]

What makes CAR A "JAM BRAKE"? /scratch head

 

Uhmm...how many reasons would you like?

1. Log fall from lorry?

2. Puncture / Blowout?

3. Someone cut his lane?

4. Heart attack?

 

 

The point of leaving a gap is not when things go well, because yes, if not panicing, if time to plan, even 1 car length at 100 km is enough - just witness F1 - they can follow so close as they KNOW what happens next.

 

On the road you never really know what might happen next, so must give yourself time to plan for the kuku driver. Car A could jam for many reason or for no reason, makes no difference to B or C right? They still bang his backside = PAIN

[Darryn]

Not really. Unless front car defies law of physics and comes to an instant stop. Or a tree falls right across the road. Or the ground caves in.

 

But I get what you are trying to say. Don't disagree with you.

 

Try to think of it like this.

 

C A R A P R E S S B R A K E C A R A S T O P P I N G D I S T A N C E I S T H I S F A R (whoops, B hit A)

car b sees brakes and reacts C A R B P R E S S B R A K E C A R B S T O P P ING DISTANCE IS LIKE THIS

 

The point to be made is that A is ALREADY STOPPING while you are reacting.

 

IF the distance between you is LESS than your reaction time, then you have to stop in a SHORTER distance than him.

Edited October 23, 2010 by Darryn

[Good-Carbuyer]

i might be a girl but i drive an integra

your honda jazz is as much rubbish as how safe you drive, its just that you don't see it yourself

you are a completely self-centered, selfish driver

i'm sure you are single too because no girl will ever want to date a jerk like you!

Sure its a lady? the name misleading one?

[Good-Carbuyer]

Hi all,

 

Wanna know whether this is considered safe overtaking:

 

1. At lane 1, Car A in front is traveling at around 90~100 and there is wide gap in front (about 5~6 cars length).

2. Car B behind Car A wanted to overtake.

3. So Car B, move to Lane 2 and overtake Car A at Lane 1 easily without even stepping on brake. Turn Right signal was given.

4. Car A then high beamed and horned at Car B persistently.

 

So Should Car B feel guilty?

 

Regards,

All three lanes vehicles saw traffic lights turned green. Car A (1.3L) in Lane 1 accelerated faster than the other two lanes. Car A well ahead of others, so signalled to keep left. Car B (2.0L) who started behind Car A earlier decided to overtake Car A who was within the speed limit. Upon sighting Car B overtaking by the left, Car A had to maintain itself in Lane 1 to avoid hitting Car B. So in such instance, Car B forced Car A to stay in Lane 1 in order to avoid accident. Car B overtaking by the left safe driving? Car A road-hogging?

Edited October 23, 2010 by Good-Carbuyer

[Good-Carbuyer]

for 1 i'm gracious, i give way and allow SLOWER cars eg honda jazz to overtake me

i also don't deliberately jam brake and cause accidents

 

i don't tailgate others unless they are asking for it, like you who loves to keep a whole lot of unnecessary distance between your car and the car infront

are your brakes really THAT bad that you need 5 car lengths?

 

of course, you don't have much $$ thats why you ended up with honda jazz

i'd save the money to get a more decent car like a kia forte instead, at least that car has proper brakes unlike your cheap jazz

Can share with us what you consider makes that Kia Forte a decent car? That is the most numerous used car model for sale advertised on sgcarmart that is less than a year old?

[Good-Carbuyer]

Uhmm...how many reasons would you like?

1. Log fall from lorry?

2. Puncture / Blowout?

3. Someone cut his lane?

4. Heart attack?

 

 

The point of leaving a gap is not when things go well, because yes, if not panicing, if time to plan, even 1 car length at 100 km is enough - just witness F1 - they can follow so close as they KNOW what happens next.

 

On the road you never really know what might happen next, so must give yourself time to plan for the kuku driver. Car A could jam for many reason or for no reason, makes no difference to B or C right? They still bang his backside = PAIN

Jammed brakes usually brake lights light-up, so can see. If brake lights do not light-up more critical? (encountered 2 buses, 2 cars, like that)