Signal Hill is a small town, and most attractions can be reached on foot or by bike. However, if you need to travel farther, there are several transportation options available. The Long Beach Transit system offers bus service throughout the area, and ride-sharing services like Uber and Lyft are also available. A rental car is not necessary for this itinerary but could be useful if you plan to explore other nearby areas.
If you have more time, consider visiting other nearby attractions like the Queen Mary or the Rancho Los Alamitos Historic Ranch and Gardens. If you have less time, you could combine some of the attractions or skip some of the less popular ones. Be sure to bring comfortable shoes for hiking and walking, and check the weather forecast before your trip to dress appropriately. Finally, be sure to try some of the amazing seafood restaurants in the area!