[yash101]

Here's what I believe is the best:
Motors are probably one of the worst interference, even the smallest ones. Motors use electromagnets to convert the electrical energy to kinetic motion. Motors, because of that, when in close proximity of the bridge, can cause severe problems. That radio wave will interact and deform the radio wave of the bridge, causing it to increase it's power until it's max threshold. Then, you will notice your connection continuously dropping. When you go full speed forward, you lose connection because there is a sudden load of interference. It isn't because of the voltage drop because there is a buck converter, probably containing some smoothening capacitors. What the bridge is encased in also maters a lot. Start a router and keep the device next to it. See how good your signal is. Then, go to the other side of a brick wall, and voila! You will notice an extraneous drop in signal quality. In my room, where I keep my laptop, if I keep it 3 feet higher, on my desk, I'll get a good signal. However, when I put it on the floor next to a bunch of transformers, I am lucky to get 3 bars of signal. Oh, remember that I'm running a hacked router with DD-WRT, so I can change the transmission power manually and max it out to 251mW, powerful enough to give me a .25 mile range with another DD-WRT router at the same transmission power! Also, keep the converter away from the bridge. It constantly changes in frequency so it is almost impossible to go against! As Al said, try to have your bridge high up and flat.

This year, our bridge is on a tall pole, distant from ANY radiation, except the AXIS camera. Otherwise, it is surrounded with pneumatics and a compressor 3 feet away. That aught to give a decent connection!