Red arrows show their (signal) faces in Lehigh Valley  Q: I used
the new ramp from Route 22 east to MacArthur Road north
recently, and noticed something a bit peculiar at the end of the
ramp. There are two left-turn only lanes controlled by a set of
traffic lights, but the lights have a red left-turn arrow
instead of the usual solid red light. I have seen the red arrow
in other states, but I believe this is the first time I have
seen it in Pennsylvania. Has PennDOT come around to doing this
the way other states do, or were the lights installed by and
out-of-state contractor?  — Mike Slagle, Lower Macungie Township
A: PennDOT has come around, Mike.   Traffic-signal green arrows
have been on the road since the Warrior can remember, and he's
been driving since 1967. They're standard models on dedicated
right- or left-turn lanes, granting motorists the exclusive
right of way to make the specified turn. If a circular green
light ("green ball") illuminates after a left-turn green arrow
goes out, motorists can tur