It so happens that much of the construction from the last 3 years is starting to bear fruit and riders will benefit, especially in the next few months.
I-5 HOV Project
Shoemaker Bridge is now open (as of June 1). For northbound riding over the I-5 onto Rosecrans, east out to La Mirada Blvd or VV this is a good, safe choice. Southbound, not so much.
In the next few weeks, Alondra Bridge will reopen, making it possible to get to northbound Valley View (VV) from Moody/Carmenita.
405 HOV Project
Seal Beach Blvd bridge is now open with 7 lanes. I rode it last sunday (North) 3 times. On the 3rd time I hit 35 MPH and took the center lane, by passing all the cars lining up to go right onto Lampson. There are still some k-rails (northbound) filling the bike lane but they are past the summit and don't pose a huge problem.