Bimodal green arrow/yellow arrow (not FYA)

[PHLBOS]

Southeastern PA used to have bimodal G/Y arrow signalheads on many a few of their signalized intersections but most if not all of them have since been replaced with the now-more common 5-head doghouse signalheads

[Ian]

Southeastern PA used to have bimodal G/Y arrow signalheads on many of their signalized intersections but most if not all of them have since been replaced with the now-more common 5-head doghouse signalheads

Wait, really? All the 4-section protected/permissive left turn signals I've seen there have just been R-Y-G-GA signals where the green arrow just goes off after the left turn phase is over.

[PHLBOS]

Southeastern PA used to have bimodal G/Y arrow signalheads on many a few of their signalized intersections but most if not all of them have since been replaced with the now-more common 5-head doghouse signalheads

Wait, really? All the 4-section protected/permissive left turn signals I've seen there have just been R-Y-G-GA signals where the green arrow just goes off after the left turn phase is over.

Many years ago, the signal at the US 13/PA 420 intersection in Prospect Park (facing US 13 southbound) indeed had a 4-section signal head with the bimodal left-arrow at the bottom.  I remember that one vividly during the 90s back when I drove to work an a daily basis.

[Ian]

Southeastern PA used to have bimodal G/Y arrow signalheads on many a few of their signalized intersections but most if not all of them have since been replaced with the now-more common 5-head doghouse signalheads

Wait, really? All the 4-section protected/permissive left turn signals I've seen there have just been R-Y-G-GA signals where the green arrow just goes off after the left turn phase is over.

Many years ago, the signal at the US 13/PA 420 intersection in Prospect Park (facing US 13 southbound) indeed had a 4-section signal head with the bimodal left-arrow at the bottom.  I remember that one vividly during the 90s back when I drove to work an a daily basis.

Interesting, never knew about that. I wonder why PA didn't use more of them as opposed to just having the green arrow.

[PHLBOS]

Many years ago, the signal at the US 13/PA 420 intersection in Prospect Park (facing US 13 southbound) indeed had a 4-section signal head with the bimodal left-arrow at the bottom.  I remember that one vividly during the 90s back when I drove to work an a daily basis.

Interesting, never knew about that. I wonder why PA didn't use more of them as opposed to just having the green arrow.

Such was probably done on an experimental basis.  IIRC, a couple other examples were at the PA 420/MacDade Blvd. (signalhead faced westbound MacDade traffic) and along Ridge Pike in Montgomery County (near I-476).