| ??? 11/11/07 22:43 Read: times |
#146877 - Even the trivial is impossible Responding to: ???'s previous message |
Joe said:
Interconnect all of the traffic lights within a city to synchronize their cycles such that any car, starting from any red light at the commencement of a green period, and traveling at or no more than five miles per hour under the posted speed limit, will catch the lights green as long as he stays on a given street. I don't think this is possible even in the degenerate case of just one street with equally spaced lights. Suppose the speed limit is 45 MPH and the lights are set such that (once it gets synched up) a car going 42.5 MPH hits all green lights. A car going 40 MPH would eventually get to an intersection too late and thus see a yellow light, while one going 45 MPH would eventually get to an intersection too early and thus see a red one. True? -- Russ |
| Topic | Author | Date |
| waitring at a red light I came to think about ... | 01/01/70 00:00 | |
| Are there trivial tasks at all? | 01/01/70 00:00 | |
| Define trivial :-) | 01/01/70 00:00 | |
| Trivial traffic conditions | 01/01/70 00:00 | |
| reminds me | 01/01/70 00:00 | |
| Even the trivial is impossible | 01/01/70 00:00 | |
| Statistics | 01/01/70 00:00 | |
| re: Statistics | 01/01/70 00:00 | |
| We already do that | 01/01/70 00:00 | |
| but that's good only for a single car... | 01/01/70 00:00 | |
| RE: but that's good only for a single car... | 01/01/70 00:00 | |
| We have two main applications | 01/01/70 00:00 | |
| Big Brother, eh? :-) | 01/01/70 00:00 | |
| yep we are watching you | 01/01/70 00:00 | |
| Fundamental flaw | 01/01/70 00:00 | |
| my point was that... | 01/01/70 00:00 | |
| How about Grid-lock? | 01/01/70 00:00 | |
| Intellegent or tunnel vision? | 01/01/70 00:00 | |
| More stuff to add | 01/01/70 00:00 | |
| a few more | 01/01/70 00:00 | |
More | 01/01/70 00:00 |