In Montana ROW projects, when is alternating one-way traffic typically required?

In Montana ROW projects, when is alternating one-way traffic typically required?

• A. When there are two lanes open in both directions.
• B. When lane closures or obstructions reduce capacity, requiring traffic to move in one direction at a time.
• C. During rain only.
• D. Only in rural areas.

Answer: (B)

In work-zone traffic control, alternating one-way traffic is used when lane closures or obstructions reduce capacity, requiring traffic to move in one direction at a time. This setup prevents head-on conflicts and keeps delays organized by letting only one direction pass through the affected area at a time, often guided by flaggers and warning devices as part of the traffic control plan. It applies whenever there isn’t enough width or lane availability to safely accommodate two-way traffic, regardless of whether you’re in a city, rural area, or weather conditions—the trigger is reduced capacity, not rain or location. Other situations, like having two open lanes in both directions, don’t call for alternating flow, since there’s still room for traffic to pass in both directions safely.

In work-zone traffic control, alternating one-way traffic is used when lane closures or obstructions reduce capacity, requiring traffic to move in one direction at a time. This setup prevents head-on conflicts and keeps delays organized by letting only one direction pass through the affected area at a time, often guided by flaggers and warning devices as part of the traffic control plan. It applies whenever there isn’t enough width or lane availability to safely accommodate two-way traffic, regardless of whether you’re in a city, rural area, or weather conditions—the trigger is reduced capacity, not rain or location. Other situations, like having two open lanes in both directions, don’t call for alternating flow, since there’s still room for traffic to pass in both directions safely.