A scientist who studies roads and highways is often referred to as a transportation engineer or civil engineer, specializing in transportation. These professionals analyze and design transportation systems to improve safety, efficiency, and sustainability. Some may also focus on specific aspects like traffic flow, road materials, or urban planning.
Technologist.
I do not know if there is a name for it, but I know that most people who go into robotics are engineers.
James Watt was the name of that scientist.
Bitumen
Micheal Jackson
The name of a scientist that studies sports is called a sports scientist.
An arachnologist
A virologist is a scientist who studies viruses.
A scientist who studies animals is called a zoologist.
A scientist who studies radioactivity is called a nuclear physicist or a radiologist.
A scientist who studies animal life is a zoologist. There is no particular name for a scientist that specialises in platypuses.
The name for this type of scientist is a teuthologist
This answer is a entomologistA scientist who only studies fish is called an ichthyologist.
Astronomer
environmentalist
ecologist
Parasitologist