Some lanes are going to be Sentry lanes and some Ready lanes, the rest will be your slow moving hours long to cross lanes if you do not have a Sentry pass or the Ready lane documents.
The San Ysidro port of entry (San Diego) has been partially redone and all they did was create more Sentry lanes and Rady lanes, those that do not have these passes or documents have to endure the long wait times any way.
If you want to traverse the border fast get a Sentry pass or a Ready lane pass, unless you want to spend time in a slow line.
Be carfull of what lane you take CBP officers get real mad when you accidentally use the wrong lane, some will give you a fine, the Mexican side is very poorlly marked as to what lanes are for what.
navegator