[Tagging] mandatory restriction with via way as members

[Tobias Wrede]

Am 02.05.2017 um 10:11 schrieb Martin Koppenhoefer:
>> On 2. May 2017, at 08:53, Michael Tsang <miklcct at gmail.com> wrote:
>>
>> What would you say this restriction means? Does it mean that once a vehicle starts the from way it must go along the whole length to the to way?
>
> it means you can't go any other way than to the to way, you might stop though, (unless there are other restrictions preventing you from doing so). Not entirely sure about backing up, but likely can't do it either (because if you go to the via way you have to follow the "only" restriction).
>
I would understand it the same way. To be a little bit more concrete: If 
you come from the northbound Gloucester Rd via the nothern loop (way 
46615969) onto Victoria Park Rd (way 46615970 and onward) you must 
continue on the northern bit of westbound Gloucester Rd (way 244383612) 
and you are not allowed to take the middle or southern Gloucester Rd 
(244383597 and 486608995). If you come from the secondary Gloucester Rd 
(way 486608999), the other bit of Victoria Park Rd (way 87081210), 
Cannon St or Percival St, though, you may continue on either the 
northern, middle or southern part of Gloucester Rd.

This arrangement looks a bit strange to me. Is this what you intended to 
tag? If there is such rule set in place on is there not any physical 
barrier on the road preventing the lane changes? That case might warrant 
splitting the raod into two parallel segments.

Thank god I never had to drive own-handed in HK. :-)
Tobi