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In order to better control traffic at a certain busy intersection, a study was conducted to determine how many vehicles passed through the intersection during various times of day and what trajectories they took. For each possible trajectory (combination of direction from which a vehicle entered the intersection and direction to which it exited the intersection), the graph shows the number of vehicles passing through the intersection during a certain hour.
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| Text Component | Literal Content | Simple Interpretation |
|---|---|---|
| Study Purpose | In order to better control traffic at a certain busy intersection | Traffic patterns were studied to improve intersection management |
| Study Methodology | A study was conducted to determine how many vehicles passed through the intersection during various times | Researchers counted vehicles at different times |
| Trajectory Definition | Combination of direction from which a vehicle entered the intersection and direction to which it exited | Trajectory = entry direction + exit direction |
| Time Period | During a certain hour | Data covers only a single hour |
| Data Representation | The graph shows the number of vehicles passing through the intersection during a certain hour for each route | A chart displays vehicle counts for each entry-exit pair |
| Chart Component | What's Shown | What It Indicates |
|---|---|---|
| Graph Type | Horizontal bar chart with 12 bars (each = a direction pair) | Each bar represents a trajectory (entry\(\rightarrow\)exit combination) |
| Bar Values | Bars range from 30 to 98 vehicles | Traffic volume varies greatly by trajectory |
| Highest Bar | West \(\rightarrow\) East: 98 vehicles | Most common single route |
| Lowest Bar | West \(\rightarrow\) South: 30 vehicles | Least common route |
| Pattern For South Entry | South\(\rightarrow\)North: 97, South\(\rightarrow\)East: 95, South\(\rightarrow\)West: 96 | Vehicles entering from South distribute almost evenly |
| Pattern For West Entry | West\(\rightarrow\)North: 45, West\(\rightarrow\)East: 98, West\(\rightarrow\)South: 30 | High variation, very few go West\(\rightarrow\)South |
| Totals By Entry Direction | South: 288; North: 256; East: 186; West: 173 | South is the busiest entry |
Southbound entries dominate the intersection, both in number and balance—nearly equal numbers head north, east, and west. The most frequent path overall is West to East (98 vehicles), while West to South is used the least (30 vehicles), suggesting strong directional trends. These patterns indicate that traffic management efforts should focus on accommodating heavy flows from the South, and possibly investigating the low usage of the West to South path.
During the hour, the greatest number of vehicles entered the intersection from the _____
and among those vehicles entering the intersection from that direction, the greatest number of vehicles exited the intersection to the _____
The south direction had the largest number of vehicles entering the intersection (288). Of those, most exited to the north direction (97).
The second question depends on the answer to the first since it asks about vehicles from the direction identified in question 1; therefore, the questions are not independent.