It would be a large, highway style bridge, looking something like this:
Here's the official Rivercrossing FAQ.
All of the significant Breakfast Blog pieces on the bridge are tagged "Rivercrossing - Third Bridge" and can seen here.
Whether you think a bridge like this is necessary or a bad idea, it would be the largest infrastructure project in a generation here and therefore should receive exceptional levels of scrutiny.
Needless to say, many of us think it's a bad idea. Here's why:*
The Case Against the Highway and Bridge
Modeling and projections for future demand are wrong
- Absolute trip counts are flat
- Vmt/capita is down
- Young people are getting fewer licenses and are driving less
- Pricing is wrong: gas and energy costs will rise; carbon, congestion, vmt will likely be taxed
- Obesity and diabetes are increasing (national and state reports, also nice summary here at The Atlantic)
- Maintaining and preserving existing infrastructure should be higher priority
- Investing in transit and other alternatives to drive-alone-trip will better allocate existing capacity
- The onramp system will degrade highland neighborhood and harm historic properties
- Privileging through-movement drastically harms internal connectivity and create barriers