Traffic Density mod for ATS 1.6 v1.0

For 1.6
Mod update for 1.6 game version.

Fixed issues for work in 1.6.
Increased traffic density.
AI traffic.without accidents.
Increased train length
Increased safe distance beween trains.
Fixed str_param for police cars
Reduced police activity.
Reduced weight station calls.

Warning. California speedlimits set to 75 mph.