Answer:
Congressman Riley might argue that H.R. 123456, which proposes a national interstate speed limit, is a necessary step towards improving safety on our nation's highways. He might argue that by implementing a consistent speed limit across all states, there will be less confusion for drivers who may be traveling through multiple states, and there will be less variation in speed limits on different stretches of road. This can help to prevent accidents caused by speed limit changes, which can be jarring for drivers.
Another argument that Congressman Riley might make is that a national interstate speed limit can help to reduce fuel consumption and emissions. Setting a consistent and lower speed limit would mean that vehicles would be traveling at lower speeds more frequently, which in turn would mean that they would use less fuel. This reduction in fuel consumption would lead to a reduction in emissions and air pollution, which would benefit the environment and public health.
Moreover, Congressman Riley could also argue that this bill would be beneficial for the economy as well. Lowering speed limits can also mean less wear and tear on vehicles and less need for expensive repairs. This means that drivers would be able to save money, and businesses that rely on trucking would save money by reducing the costs of fuel and repairs. Additionally, safety benefits can also have a positive impact on the economy.
In conclusion, Congressman Riley might argue that H.R. 123456 would be a good idea as it would improve safety on the nation's highways, reduce fuel consumption, reduce emissions, and benefit the economy by saving costs for drivers and businesses.