No, not any practical way to add it on the top green banner which presently shows only the road being travelled on when not actually routing... and i should have made that clearer perhaps. To alter the firmware in such a way as to change that, if indeed it's even possible, you'd likely need the firmware's original source code (unobtainable of course) along with considerable hacking skills to modify the 14xx fw to include the function. Way above any amateur's capabilities even with access to the source code anyway.

However when using the device as a moving map, you can see the upcoming side-street name on the map itself. If they don't show in your 1490's map screen in default magnification then go to Tools>Setting>Map and select "Most" in Map Detail.