obligation to vote?

[sr.christinaosf]

The Catechism states that we are morally obliged to exercise the right to vote in keeping with "submission to authority and co-responsibility for the common good."
However, I wonder if this is universal.
What about cases that do not involve moral issues?
We are having a city measure voted upon tomorrow as to whether a city park should be preserved or may be eliminated for the creation of a housing development.
I am going to be out of town part of the day and also am not able to drive due to a vision impairment. 
Getting over to vote would be a challenge for me.
Does anyone have insight from Church teaching as to whether the obligation to vote really exists in such a case?
Thanks.

[Guest]

Were it me, Sister, I would ask my pp.  You posted 8 hours ago and you may have decided by now about what to do.  If you haven't and if your pp is unavailable for some reason, I would be phoning my diocesan offices for advice.

We are certainly not obliged to do the impossible; however, you state you would be "challenged" and I guess it would depend on just how challenged you would be.  The issue of whether a park should be retained or replaced by a housing development probably is some kind of moral issue.