Interstate 110

Interstate 110 was a major North-South freeway running through Los Angeles, that led to San Pedro.

Chaos Theory
At around 4:30am, Jack Bauer drove from Downtown to Playa Del Ray via the 110.

Later in the day, the road became heavily congested due to accidents orchestrated by Zapata. At 7:24pm, Jack chased Zapata down the freeway on a motorbike, cornering him at the intersection of the 101, and shot him in the head.

Day 1
At 9am, Dave Thompson flew over the 110 while reporting the traffic.

Day 2
The 110 was one of the major LA roads within the blast radius of the nuclear device, according to a presentation by Eric Rayburn.

Background information and notes

 * The 110 freeway was used for establishing shots in Day 1: 9:00am-10:00am, including the start of the episode and Carl Webb's building.