In ArcGIS 10.1 (advanced license) I have a slope raster, and a raster representing a road network. In the road raster, each pixel is given value 0.5, and the areas outside roads are set to NoData. Now, for some purposes I have to accomplish, I need to half the slope value in those cells that fall within roads. I cannot multiply SLOPE by ROAD rasters because I would end up with NoData in those areas outside the roads.
How can I keep the slope value unchanged for the cells outside the roads?