What was one effect of the interstate highway act of 1957?
a. the emergence of the car as america’s main mode of transportation
b. the creation of speed limits as a result of increased highway accidents
c. the sluggish development of the airplane industry
d. an increase in the populations of midwestern and western cities
e. fewer jobs because the railroads lost business

One effect of the Interstate Highway Act of 1957 was "b. the creation of speed limits as a result of increased highway accidents" since people were not used to driving at such speeds for such long distances. 

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.