I would place it in the space between the campsite and the house, and I would consider centering the middle bridge more and bringing the right one up the side a bit before the lake.
Little bit left to where Elephantmarshmallow pointed at.. should be enough room away from the residents room I think?..
so 3 straight vertical bridges? well, just an idea xD I don't like putting paths around the diagonal bridges (hard to match the pattern) so that's what I did in my town ;__;
Honestly, I'd remove that far right bridge and bring it up just a few spaces so it can sit as an angled bridge (because those are gorgeous, imo). Then maybe center the middle one just a little more as someone else suggested. Since I don't know how you've landscaped, I can't really assume much, but I feel like those bridges are a little too close together as they are. OR you could move that far right bridge up beneath that house you have (I think someone else mentioned that, too). That would def put some space between the two bridges. For the thiiiird, I feel like it -should- fit where elephantmarshmallow circled, but at an angle instead of straight across. If not there, then over to the left. Anywhere over there is good since you don't have a bridge in that area~! c:
If you can, try to get the left most (third bridge) on an angle if possible or if the X'd out villager moves, place it where the other suggestion is and move the right most bridge so its where the other lines are in the picture are, it would allow better access to the beach ramp.
I agree with many of the other posters ideas of placing the bridge in the upper left portion of the map. Maybe just above the town hall.That will help create a shorter route between that portion of the map and the train station.