AMP: 321 Location: US-20 and Farnsworth Way, Rigby 1 mile until the business loop rejoins as US-20 bypasses town to the east. Rigby is home to the inventor of the television, Philo Farnsworth. AMP: 322 Location: US-20 and Farnsworth Way, Jefferson Cty Exit for US-20 Business west.  E to SH-33, W to SH-43  W to SH-48  E … Continue reading U.S. Route 20, US-20 Bus to US-20 Bus