that is a carbon-copy of the old "209 SOUTH - Rosecrans St - 1/4 mile" sign which had the 209 shield removed.
the worst example I can think of is 5 northbound at 52, which has a similar WEST for La Jolla Parkway, which was at one point 52 west. now 52 (east only) and La Jolla Parkway (west only) start at 5.
it gets extra confusing because there is a single exit-only lane to serve them both, and before the split, you get signs which say "La Jolla Parkway/52", leaving it ambiguous as to whether the two are two designations for the same stretch of road, or they refer to different stretches. then, the exit-only lane splits in two
, yielding "WEST La Jolla Parkway" to the right, and "52 EAST" to the left.
so we have several separate problems of varying degrees of egregiousness:
1) given the existence of many, many named freeways in California, it is logical to expect that "52" and "La Jolla Parkway" refer to precisely the same length of road. This is incorrect - at no point do they overlap, as one is on one side of 5 and one is on the other.
2) no control cities: 52 EAST does not, by name, go anywhere (Santee or El Cajon would be the correct control city). La Jolla Parkway is implied to go to La Jolla - maybe? It needs to be made explicit as well. This absence of control cities just enhances point "1".
3) the floating WEST banner for La Jolla Parkway is definitely a mistake which needs to be patched out. Here, we do not give banners to street names. Certainly not all-caps ones.
4) a/b exits (where the exit-only lane splits in two before it has detached from the freeway) are sufficiently rare in California that they require much more precise signage. The driver's instinct is to assume that the EXIT ONLY implies a single exit, consisting of a single ramp, and if one bears right to make the right-hand exit, he will be led towards his destination, which is "La Jolla Parkway - 52" - and later, when one has detached from I-5, he may make the decision on the correct direction of 52 he wishes to take. This is not the case. There are three gantries for this exit: the first two are "La Jolla Parkway - 52" and only the third - when the exit lane has just about completely split and correcting one's lane choice is getting dicey - mentions that "52" and "La Jolla Parkway" are, in fact, discrete entities going in opposite directions.
5) another flaw in the exit design - the flyover lane. The right fork of the ramp (WEST La Jolla Parkway) swings left. Therefore, to make a correct, instinctive right curve to go from 5 northbound to 52 eastbound, one has to bear left-and-then-right. This certainly needs to be signed in advance much more elaborately than a single sign at the split where the driver is suddenly shown a scrambled flyover maze.
yep, you can guess how many times I ended up on La Jolla Parkway, instead of 52, before I figured this one out.