Which of the following was NOT an effect of the increased deployment of railroads?

The development of the light bulb was not an effect of the increased deployment of railroads. While railroads were crucial in transforming transportation and communication during their time, the invention of the light bulb was primarily a separate technological advancement driven by the needs for electric lighting and improving daily life in urban areas.

In contrast, the increased deployment of railroads had a direct impact on several other aspects. The demand for rail transport significantly boosted the use of coal as it served as the primary fuel for locomotives. The establishment of time zones emerged from the need to create a standardized system for scheduling trains across the vast distances covered by railroads, addressing issues caused by varying local times. Additionally, the development of the telegraph coincided with and supported the railroad expansion, facilitating quicker communication to manage train schedules, safety, and operational efficiency.

Understanding these relationships provides insight into how technological advancements are often interlinked, shaping societal structures and daily life.