Which two criteria must be considered when conducting an outdoor bridge site survey? (Choose two.)

The near-far effect relates to power imbalance between close and distant transmitters in shared-medium systems and is not a primary outdoor bridge site survey criterion.

Weather conditions such as rain, fog, and wind cause signal attenuation and can physically shift antenna alignment, directly degrading outdoor bridge link reliability - especially over long distances where rain fade becomes a measurable factor.

Traffic lights operate in optical and low-power control bands that do not meaningfully interfere with 2.4 GHz or 5 GHz outdoor bridge frequencies.

Power lines can cause minor EMI but are not a primary site survey criterion for outdoor bridges; Fresnel zone clearance and weather have far greater impact on link quality.

The Fresnel zone is the elliptical RF propagation region between antennas that must remain at least 60% clear of obstructions; blockage within this zone causes diffraction losses that significantly reduce received signal strength and link budget.