Final answer:
Two ways to reduce risk when driving on urban highways are to observe speed limits and traffic signals and to maintain a safe following distance.
Step-by-step explanation:
Two ways to reduce risk when driving on urban highways are to observe speed limits and traffic signals and to maintain a safe following distance. By obeying speed limits and traffic signals, drivers can reduce the likelihood of collisions and follow the flow of traffic. Maintaining a safe following distance allows drivers enough time and space to react to sudden changes in traffic ahead.