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Traffic Simulator

traffic-simulation.de

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Re: Traffic Simulator

#61

Post by asdff »

parhamn wrote: post #33
pc86 wrote: post #19

Earlier quoted context omitted.

This would be a neat reinforcement learning project. > Some places the drivers are so polite to the point it really makes things dangerous I've known people like this, who will approach a 4-way intersection and stop even when they don't have a stop sign and the perpendicular street does.

> who will approach a 4-way intersection and stop even when they don't have a stop sign and the perpendicular street does Not the main point but I never liked how traffic signs aren't affirmative sometimes. In the case of the 4-way usually the stopping direction have a stop sign with a missing "All Way" sign below it. But thats not required in all jurisdictions. Nor is the non-stopping direction 100% sure their stop…

Stop signs are the shape they are so you can recognize them from the reverse for this purpose

Re: Traffic Simulator

#62

Post by recursive »

sandworm101 wrote: post #56

I love these little simulators because while they purport to show that slower more polite driving is more efficient, more often than not they show the exact opposite. Want to shove the most cars through per hour? Remove the speed limit. Accelerate and brake like every intersection is a drag race. Leave absolutely no distance between cars. And dump any notion of polite lane changes. NASCAR was right: Minimize unused p…

> they purport to show that slower more polite driving is more efficient

Where are you seeing this?

Re: Traffic Simulator

#63

Post by jedberg »

sandworm101 wrote: post #56

I love these little simulators because while they purport to show that slower more polite driving is more efficient, more often than not they show the exact opposite. Want to shove the most cars through per hour? Remove the speed limit. Accelerate and brake like every intersection is a drag race. Leave absolutely no distance between cars. And dump any notion of polite lane changes. NASCAR was right: Minimize unused p…

That's because these simulations don't include inattentive drivers. They assume everyone behaves ideally.

Normally all those things you said would result in accidents. If the simulators randomly added delays for cars braking or starting up, and then kept a death count, it would be more accurate...

Re: Traffic Simulator

#64

Post by asdff »

throwaway0a5e wrote: post #54
fooyc wrote: post #45

The more lanes you add, the more cars you get. Adding more lanes doesn't solve traffic issues. https://en.wikipedia.org/wiki/Induced_demand#Induced_traffic...

"Induced demand" is just a backhanded way of complaining that more people can be served by expansion of a particular piece of infrastructure that you don't like. Nobody ever complains about induced demand on the subway from more frequent service causing more people to decide that's the best option for them. Rush hour is like pouring a 5gal bucket into a sink. You can't reasonably handle that all at once will have som…

The issue with widening highways is that traffic doesn't exist in a vacuum. You aren't widening the surface roads that back up into the highway or the interchanges to other highways, that is the crux of traffic. You widen one pipe but it feeds into the same set of narrow straws anyway, and your sink is just as backed up.

Re: Traffic Simulator

#65

Post by kevindong »

sandworm101 wrote: post #56

I love these little simulators because while they purport to show that slower more polite driving is more efficient, more often than not they show the exact opposite. Want to shove the most cars through per hour? Remove the speed limit. Accelerate and brake like every intersection is a drag race. Leave absolutely no distance between cars. And dump any notion of polite lane changes. NASCAR was right: Minimize unused p…

A pet peeve of mine when I still drove was when drivers would leave 1-3 car length's in front of their car when stopped at a stoplight. And then after the car in front starts moving, it'd take them a solid second to start inching forward also.

The bigger problem was that this type of behavior was the norm to the point where at slow speed intersections with stoplights (e.g. city streets around college campuses), only a single digit number of cars would be able to go through per green light.

Re: Traffic Simulator

#66

Post by jonnycomputer »

recursive wrote: post #62
sandworm101 wrote: post #56

I love these little simulators because while they purport to show that slower more polite driving is more efficient, more often than not they show the exact opposite. Want to shove the most cars through per hour? Remove the speed limit. Accelerate and brake like every intersection is a drag race. Leave absolutely no distance between cars. And dump any notion of polite lane changes. NASCAR was right: Minimize unused p…

> they purport to show that slower more polite driving is more efficient Where are you seeing this?

In this instance, upping the politeness bar seems to reduce traffic ...

Re: Traffic Simulator

#67

Post by sandworm101 »

kevindong wrote: post #65
sandworm101 wrote: post #56

I love these little simulators because while they purport to show that slower more polite driving is more efficient, more often than not they show the exact opposite. Want to shove the most cars through per hour? Remove the speed limit. Accelerate and brake like every intersection is a drag race. Leave absolutely no distance between cars. And dump any notion of polite lane changes. NASCAR was right: Minimize unused p…

A pet peeve of mine when I still drove was when drivers would leave 1-3 car length's in front of their car when stopped at a stoplight. And then after the car in front starts moving, it'd take them a solid second to start inching forward also. The bigger problem was that this type of behavior was the norm to the point where at slow speed intersections with stoplights (e.g. city streets around college campuses), only…

Or worse yet, they leave so much space that they don't trigger the sensors. That can mess with the traffic management scheme, sometimes preventing a light from ever changing.

Re: Traffic Simulator

#68

Post by recursive »

jonnycomputer wrote: post #66
recursive wrote: post #62

Earlier quoted context omitted.

> they purport to show that slower more polite driving is more efficient Where are you seeing this?

In this instance, upping the politeness bar seems to reduce traffic ...

The comment I was responding to indicated the opposite.

Re: Traffic Simulator

#69

Post by 99_00 »

fooyc wrote: post #45

The more lanes you add, the more cars you get. Adding more lanes doesn't solve traffic issues. https://en.wikipedia.org/wiki/Induced_demand#Induced_traffic...

Traffic isn't the primary problem. It is a side effect of mobility, which is desirable.

If Traffic was the primary problem then the solution would be to eliminate roads.

Re: Traffic Simulator

#70

Post by jschwartzi »

shellfishgene wrote: post #17
searedsteak wrote: post #14

Looks like maxing out acceleration solves all other problems. I guess we should require a minimum power-to-weight ratio for cars from now on.

This would actually be possible to implement with the general switch to electric cars...

What about electric trucks? I set the veh/hr to max and then when I changed truck percentage to 14% I almost immediately stopped traffic at the onramp as the trucks inevitably don't have enough space to accelerate from the meter point. Especially if one of the cars cuts the truck off.
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