I work in a geographically diverse city, so I encounter everything from rural to urban settings. Being in a place bisected by a river, railroads, etc., I'm currently grappling with two connectivity issues.
The first concerns a currently rural bend in the river. Its significant topography precludes intense development on most of it, yet its southern tip is fairly flat. The tricker is that the nearest "outside" connection is 5 miles north, along a state highway.
What effect would a bridge have on the area, and would it be a responsible condition of future development on the river bend or north of it? I realize there are several answers here, one being that the bridge will "induce" travel demand and land development. Another answer could be that adding a bridge would enhance the overall transportation network, reduce trip distances and responsibly support future development on the river bend.
Overall, have people had experience with a situation like this, or just general impact analysis of new bridges? 2 lane? 3 lane? 4 lane? Any bridge onto the river bend would connect onto a narrow, 2-lane farm to market road.
The next case involves creating a viaduct connection over a major railyard, upgrading a local residential street into more of an arterial street to provide an east-west connection in an area otherwise limited by rail lines and freeways. See the "Existing" and "Proposed" images for an idea of what could happen here. Again, if anyone has thoughts on how to assess the impact of this, I'd appreciate it.