Re: [sumo-user] No more on-ramp flow merge after SUMO update

[Björn H. <hen...@ib...>]

Hi Daniel,

On Thursday 27 October 2011 13:06:57 wrote Daniel Krajzewicz:
> Let us know if you have any further insights.

I got it!

With the old version of SUMO I didn't have any connection definitions at the 
"junction" where the on-ramp is connected to the acceleration lane because 
netconvert did everything fine.

After updating SUMO I had to add such connections, because without them 
netconvert, now, connects the on-ramp to the leftmost lane of the acceleration 
section. But, these new connection definitions changed the priorities of 
junction highway-before-ramp, such that the incoming highway lanes had a 
higher priority than the on-ramp lane (response="110" in the respective 
request-tag). Hence, vehicles on the on-ramp had to wait until no more 
vehicles on the highway lanes approach the acceleration section, which never 
happens.

Thanks to the wiki I found the solution to add attribute pass="true" to the 
connection-tags. Then netconvert gives all highway and on-ramp lanes the same 
priority, again.

Now, I got again my formerly solved problem that the traffic jam only occupies 
the right lane while vehicles on the left do not slow down remarkebly. So, 
some work remains. I'll let you know if I need help resolving that.

BTW, many of the network tags documented in the wiki have still their old 
name, for example, "nolanes" instead of "numLanes".

Regards
Björn