What was a significant design flaw in the existing two-light traffic signals that Morgan aimed to correct?

Answer

They presented an abrupt transition between movement and cessation

The earlier two-light systems lacked an intermediate warning, meaning a driver would suddenly switch from 'go' to 'stop,' which increased the potential for driver confusion and rear-end collisions.

What was a significant design flaw in the existing two-light traffic signals that Morgan aimed to correct?
inventioninventorAutomobiletraffic lighttraffic control