I created a specific render profile which is dedicated to help recognizing network classes.
Do not use this in production unless you love weird colors
To configure this profile just copy the text into a file named xmap-networkclasses.properties, store the file in [xmap]/conf and restart the xmap.map.profile=xmap-networkclasses.properties
#MOTORWAY 0
#HIGHWAY 1
#TRUNK_ROAD 2
#COUNTRY_ROAD 3
#CITY_ROAD 4
#RESIDENTIAL_ROAD 5
#SPECIAL_ROAD 6
#CYCLE_AND_WALKWAY 7
# 16777215 = WHITE
# 16776960 = CYAN
# 16711935 = MAGENTA
# 16711680 = BLUE
# 65535 = YELLOW
# 65280 = GREEN
# 255 = RED
# 0 = BLACK
[config.streeti.colorbytype]
0=16777215
1=16776960
2=16711935
3=16711680
4=65535
5=65280
6=255
7=0
[config.streetf.colorbytype]
0=16777215
1=16776960
2=16711935
3=16711680
4=65535
5=65280
6=255
7=0
To request this colorsceme use the CallerContext profile...
Do not hesitate to get back to me if you have questions.
Best regards Bernd