San Diego

San Diego's downtown trolley service is becoming too popular, causing officials to propose equipment upgrades to handle the rising crowds. But the bigger trolleys will take out some car lanes and affect traffic lights, and many are unhappy about it.

After three decades of planning, a new commuter rail line has opened in the San Diego area.

As the city of San Diego prepares to consider a new general plan, the San Diego Union-Tribune looks back at the last 100 years in city planning.