Which factors are considered when calculating advanced loop placement?

The correct choice focuses on the speed of vehicles and safe stopping distance, which are crucial factors when it comes to calculating advanced loop placement. Advanced loops are installed before the intersection to effectively detect vehicles waiting at a signal. When determining their placement, it's essential to consider the speed at which vehicles approach the intersection, as this influences how far back from the stop line the loops should be located.

Additionally, understanding the safe stopping distance informs how far in advance a loop should be placed to ensure it detects vehicles that may need to stop at the intersection. If the loops are placed too close, they may not effectively capture the presence of vehicles traveling at higher speeds; conversely, if placed too far back, they may cause delay in detection during green phases. Thus, ensuring the loops are strategically aligned with vehicle speeds and the necessary stopping distances is critical for optimal intersection functionality and traffic flow management.