Irvine's traffic environment is a typical Southern California car-centric city with a high dependence on highways.

Major highways include I-405 (San Diego Freeway), CA-5 (Santa Ana Freeway), CA-241 (Foothill Transportation Corridor, toll road), and CA-133 (Laguna Canyon Road), which pass through or are adjacent to Irvine.

I-405 is the most important highway in Irvine, running east-west through the northwest part of the city. It connects to LA (north) and extends to Long Beach, Torrance, El Segundo, and downtown LA. This route is heavily used by Korean commuters traveling from Orange County to LA.

I-405 is notorious for severe congestion during peak commuting hours (7-9 AM, 4-7 PM). It is not uncommon for travel from Irvine to downtown LA to take 1.5 to 2 hours or more during traffic jams. CA-5 runs north-south to the west of Irvine, connecting to Santa Ana, Anaheim, and north toward LA, as well as south toward San Clemente and San Diego.

CA-241 is a toll road to the east of Irvine, providing an alternative route that can be traveled without congestion if desired. With a FasTrak (electronic toll collection system) transponder, drivers can pass through toll booths without stopping. This route is particularly useful when traveling from Irvine to Riverside or inland areas.

CA-133 (Laguna Canyon Road) is a major road leading from Irvine to Laguna Beach, and this road also experiences significant congestion on weekends and holidays.

In terms of public transportation, Irvine is served by OCTA (Orange County Transportation Authority) buses that connect the city, but compared to LA, the route coverage and frequency are limited, making it difficult to rely solely on public transport for daily life. Metrolink trains do not have a direct station in Irvine, but nearby stations in Tustin or Irvine/Flat Bank can be used.

Bicycle paths are well established within Irvine, and many students commute by bike near the UCI campus, but in most cases, it is far from practical to rely solely on a bicycle for commuting to work or shopping.

In conclusion, having a vehicle is essential for life in Irvine, and if planning to commute from Irvine to LA, adjusting departure times to account for I-405 congestion is very important. Utilizing real-time navigation from Waze and Google Maps is a common habit among Irvine drivers.