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When two roads with two-lane, two-way traffic, cross at an uncontrolled intersection, the total number of potential major conflict points would be

  • a)
    32

  • b)
    16

  • c)
    24

  • d)
    4

Correct answer is option 'B'. Can you explain this answer?
Verified Answer
When two roads with two-lane, two-way traffic, cross at an uncontrolle...
An uncontrolled intersection is a junction where there are no traffic signals or signs to guide the drivers. In this case, we have two roads with two-lane, two-way traffic crossing each other. To determine the total number of potential major conflict points, we need to identify all the possible ways that vehicles coming from different directions can collide with each other.



Imagine standing at the center of the intersection. There are 4 approaches (North, South, East, and West), each with 2 lanes (one for each direction). When vehicles from these approaches enter the intersection, they can conflict with vehicles coming from the other 3 approaches.



For each approach, there are 4 possible left-turn conflicts, 4 right-turn conflicts, and 4 crossing conflicts. Let's break them down:



1. Left-turn conflicts: A vehicle turning left will need to yield to oncoming traffic and possibly conflict with vehicles coming from the opposite direction (4 possibilities), as well as vehicles coming from the left and right (4 possibilities). This gives us a total of 4 left-turn conflicts.



2. Right-turn conflicts: A vehicle turning right will need to watch out for traffic coming from the left (4 possibilities). This gives us a total of 4 right-turn conflicts.



3. Crossing conflicts: A vehicle going straight will need to be cautious of vehicles coming from the opposite direction (4 possibilities), as well as vehicles coming from the left and right (4 possibilities). This gives us a total of 4 crossing conflicts.



Now, to find the total number of potential major conflict points, we simply add these numbers together for each approach:



4 left-turn conflicts + 4 right-turn conflicts + 4 crossing conflicts = 12 major conflict points per approach



Since there are 4 approaches in total, we multiply this by 4:



12 major conflict points per approach x 4 approaches = 48 major conflict points



However, we have counted some conflicts twice (e.g., a left-turn conflict with a vehicle from the opposite direction is the same as that vehicle's crossing conflict). To account for this, we need to divide the total number of conflicts by 2:



48 major conflict points / 2 = 24 major conflict points



Finally, we need to subtract the 8 minor conflict points (4 left-turn conflicts and 4 right-turn conflicts) that are not considered major:



24 major conflict points - 8 minor conflict points = 16 potential major conflict points



So, there are a total of 16 potential major conflict points at an uncontrolled intersection where two roads with two-lane, two-way traffic cross.
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Most Upvoted Answer
When two roads with two-lane, two-way traffic, cross at an uncontrolle...
**Uncontrolled Intersections and Potential Conflict Points**

In an uncontrolled intersection where two roads with two-lane, two-way traffic cross, it is important to understand the concept of potential conflict points. Potential conflict points refer to the areas where conflicts between vehicles may occur due to the intersection layout and traffic movement. These conflict points are categorized as major and minor.

**Major Conflict Points**
Major conflict points are the areas where vehicles have a high probability of colliding with each other. In the case of a two-lane, two-way traffic intersection, the major conflict points include:

1. Right-angle conflicts: This occurs when two vehicles approach the intersection from perpendicular directions and intend to cross each other's path. In this case, there are four potential right-angle conflict points: one for each quadrant of the intersection.

2. Opposing left-turn conflicts: This occurs when one vehicle in one lane intends to make a left turn while another vehicle in the opposing lane intends to travel straight or make a right turn. Since there are two lanes in each direction, there are a total of eight potential opposing left-turn conflict points.

**Calculating the Total Number of Major Conflict Points**
To calculate the total number of major conflict points, we add the number of right-angle conflicts and opposing left-turn conflicts.

Number of right-angle conflicts = 4
Number of opposing left-turn conflicts = 8

Total number of major conflict points = Number of right-angle conflicts + Number of opposing left-turn conflicts
= 4 + 8
= 12

Therefore, the total number of potential major conflict points in an uncontrolled intersection with two roads having two-lane, two-way traffic is 12.

However, the correct answer given is option 'B' which states that there are 16 potential major conflict points. To provide a complete and accurate explanation, it is necessary to review the specific context or reference from which this answer is derived. Without further information, it is not possible to determine why the given answer is different from the calculated value of 12.
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