交通灯

• 六(six; intersection)ASSOCIATIVE
• 乂(cross; intersect)PHONETIC

Two diagonal lines crossing like human legs stepping represent intersection and exchange.

• 辶(step; move)RADICAL
• 甬(passage; channel; path)PHONO-SEMANTIC

Following a clear pathway or passageway is the meaning of the character.

• 火(fire)RADICAL
• 丁(nail; peg)PHONETIC

A lamp uses fire to shine brightly, and its sound reading is suggested by the component ding.