Help! I visit my mom tomorrow (Tuesday). This parking spot is right across from her house. But when the heck can I and can't I park there??

see CaptainCaption

[ ------ Automatically generated photo description by CaptainCaption 2.0, copyright OttoEye, GmbH, 2022: ------

Three poles with numerous parking signs in front of a fenced park in the background. The signs read as follows:

First pole:

bylaw #o-77(rev2) not in effect 15:15 - 15:44. —bylaw #p-200001

bylaw #r-100t: parking prohibited 14:00 - 15:59

according to bylaw #f-0008: bylaw #g-111117bis not in effect

bylaw #s-95.12: bylaw #q-50 not in effect 15:30 - 15:59

rush hour lasts an hour longer on days whose names have "u" in them —bylaw #b-1399

bylaw #m-19min: all bylaws in effect unless stated otherwise

obey bylaws

bylaw #i-forty: all bylaws declaring single bylaws not in effect are not in effect the first 10 mins of every hour

Second pole:

bylaw #q-50: bylaw #r-100t not in effect 15:00 - 15:59

bylaw #q-50 not in effect —bylaw #o-77(rev2)

bylaw #n-68: parking prohibited in the a.m.

bylaw #b-1399 not in effect 18:45 - 19:14 —bylaw #a-757

parking prohibited during rush hour —bylaw #g-111117bis

rush hour starts an hour earlier on fridays —bylaw #k-9904

bylaw #d-6 not in effect during odd-numbered hours (01:00 - 01:59, etc.) —bylaw #j-13(3).

Third pole:

bylaw #t-18.1.1: bylaw #s-95.12 not in effect 15:45 - 16:59

bylaw #h-80: rush hour is 15:30 - 18:29

violators subject to minimum fine of $500, towing, and/or impoundment —bylaw #u-333.

bylaw #e-619-0: bylaw #f-0008 not in effect weekdays

warning! bylaw #c-9901 states: bylaw #d-6 not in effect when bylaw #n-68 applicable

bylaw #l-max20: parking permitted unless otherwise prohibited


bylaw #d-6: all bylaws prohibiting parking are not in effect during even-numbered hours e.g. 14:00 - 14:59

------ Automatically generated photo description by CaptainCaption 2.0, copyright OttoEye, GmbH, 2022. ------]

  • 3
    $\begingroup$ Try it out! The council of totems with funny inscriptions will decide your fate... $\endgroup$
    – Auribouros
    May 16 at 16:00
  • 10
    $\begingroup$ I suggest taking the bus $\endgroup$
    – SteveV
    May 16 at 16:04
  • 1
    $\begingroup$ Blocking out the scenery, Messing with my mind! $\endgroup$ May 16 at 17:34
  • 2
    $\begingroup$ Interesting puzzle. I found a contradiction I can't resolve though. Bylaw N-68 states "Parking prohibited in the A.M." Bylaw D-6 states "All bylaws prohibiting parking are not in effect during even numbered hours". So I would be able to park at 10:00am say. However, bylaw C-9901 states "bylaw D-6 not in effect when bylaw N-68 applicable". So is N-68 applicable at 10 am or not? Without D-6 it is applicable at 10 am, with D-6 it is not applicable. But D-6 is not in effect due to C-9901. Whichever bylaw you enforce first wins, but we can't choose which one to do first, so it's a contradiction. $\endgroup$
    – Amorydai
    May 16 at 19:24
  • 1
    $\begingroup$ @Amorydai I interpreted that as meaning that D-6 is not applicable during the AM when N-68 applies. (And that's all before you start applying i-forty.) $\endgroup$
    – fljx
    May 16 at 21:32

1 Answer 1


You're gonna have to move your car a few times during your visit. For Tuesday, the hours you can safely park your car are:

00:00-00:09; 2:00-2:09; 4:00-4:09; 6:00-6:09; 8:00-8:09; 10:00-10:09; 12:00-14:59; 15:15-15:29; 16:00-16:59; 18:00-18:59; 19:10-19:14; 19:30-23:59.

First thing I did was categorize the bylaws. The bylaws prohibiting parking are: R-100T; N-68; G-111117BIS.

The bylaws categorizing the rush hour are: H-80; B-1399; K-9904.

The bylaws declaring a single bylaw not in effect are: P-200001; F-0008; S-95.12; Q-50; O-77; A-757; J-13(3); T-18.1.1; E-619-0; C-9901.

The bylaws that are pretty much always active, unless otherwise stated: I-FORTY; D-6.

The common sense bylaws that are not relevant to this problem: M-19MIN; U-333; L-MAX20.

Ok, well, let's start with I-FORTY. All bylaws declaring single bylaws not in effect are not in effect the first 10 mins of every hour. This leaves D-6 to be active, which means you are allowed to park on the first 10 minutes of every even hour. (00:00-00:09; 2:00-2:09; 4:00-4:09; 6:00-6:09; 8:00-8:09; 10:00-10:09)

J-13(3) states D-6 is not in effect during odd numbered hours, which it doesn't effect anyway, so we can throw this one out. N-68 states parking prohibited in A.M. and C-9901 states bylaw D-6 is not in effect when bylaw N-68 is applicable. When dealing with bureaucrats you can bet they will choose to screw you whenever they can, so I'll assume the more strict interpretation that D-6 is not effective in the whole of A.M. when N-68 is applicable. This means you cannot park until noon at all, except in the first 10 minutes of every even hour, as I've already described.

Next solve the bylaws regarding R-100T. These are: P-200001; Q-50; O-77; S-95.12; T-18.1.1. O-77 says Q-50 is not in effect. However, P-200001 says O-77 is not in effect 15:15-15:44. This means Q-50 is only in effect 15:15-15:44. Next S-95.12 states Q-50 is not in effect 15:30-15:59, which means Q-50 is now only in effect 15:15-15:29. T-18.1.1 states S-95.12 is not in effect 15:45-16:59 which doesn't mean anything as Q-50 is already not in effect after 15:45 due to O-77 so we can disregard this one. Q-50 states R-100T is not in effect 15:00-15:59, but as Q-50 is only active 15:15-15:29 as I've already stated, it can only have an effect during those times, so parking is allowed 15:15-15:29.

Next look at E-619-0, it states F-0008 is not in effect on weekdays. As you're parking on a Tuesday, which is a weekday, this means both E-619-0 and F-0008 may be disregarded as they don't add any more value.

Last tangle is A-757 which deals with rush hour. First let's define the rush hour, K-9904 talks about Friday, which is irrelevant as it is Tuesday. B-1399 states the rush hour is 1 hour longer on days that have a "u" in them, which Tuesday does, so according to H-80 the rush hour is 15:30-18:29 but now it is 15:30-19:29. A-757 states B-1399 is not in effect 18:45-19:14. Rush hour thus becomes 15:30-18:44 and 19:15-19:29. However, because of I-FORTY, A-757 is not in effect the first 10 minutes of every hour. This makes the rush hour 15:30-18:44; 19:00-19:09; 19:15-19:29.

Finally, D-6 is not hampered by any bylaws after the A.M. so you can park on any even numbered hour (12:00-12:59; 14:00-14:59; 16:00-16:59; 18:00-18:59; 20:00-20:59; 22:00-22:59)

Putting it all together: due to N-68 no parking is allowed in the A.M. except the first 10 minutes of every even hour (D-6). Due to R-100T, no parking is allowed 14:00-15:59, except 14:00-14:59 (D-6) and 15:15-15:29 (Q-50). Due to G-11111BIS and B-1399, no parking is allowed 15:30-19:29 except 16:00-16:59 and 18:00-18:59 (D-6) and 19:10-19:14 (A-757). Parking is allowed after rush hour ends 19:30 onward.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.