planning: loose stop_speed to 0.3 for stop_sign check

modules/planning/conf/traffic_rule_config.pb.txt

@@ -96,6 +96,7 @@ config: {
   stop_sign {
     stop_distance: 1.0
     min_pass_s_distance: 3.0
+    max_stop_speed: 0.3
     max_valid_stop_distance: 3.0
     stop_duration : 1.0
     watch_vehicle_max_valid_stop_speed: 0.5

modules/planning/proto/traffic_rule_config.proto

@@ -86,17 +86,19 @@ message StopSignConfig {
   optional double stop_distance = 1 [ default=1.0 ]; // meter
   // min s_distance for adc to be considered have passed stop_sign (stop_line_end_s)
   optional double min_pass_s_distance = 2 [ default=1.0 ]; // meter
+  // max speed(m/s) to be considered as a valid stop
+  optional double max_stop_speed = 3 [ default=0.3 ]; // m/s
   // max distance(m) to the stop line to be considered as a valid stop
-  optional double max_valid_stop_distance = 3 [ default=3.0 ]; // meter
+  optional double max_valid_stop_distance = 4 [ default=3.0 ]; // meter
   // min time(seconds) to be considered as a full stop at stop sign
-  optional double stop_duration = 4 [ default=1.0 ]; // seconds
+  optional double stop_duration = 5 [ default=1.0 ]; // seconds
   // max speed(m/s) for watch vehicles to be considered as
   // a valid stop.(this check is looser than adc)
-  optional double watch_vehicle_max_valid_stop_speed = 5 [ default=0.5 ]; // m/s
+  optional double watch_vehicle_max_valid_stop_speed = 6 [ default=0.5 ]; // m/s
   // max stop distance for watch vehicles to be considered as
   // a valid stop.(this check is looser than adc)
-  optional double watch_vehicle_max_valid_stop_distance = 6 [ default=5.0 ]; // meter
-  optional CreepConfig creep = 7;
+  optional double watch_vehicle_max_valid_stop_distance = 7 [ default=5.0 ]; // meter
+  optional CreepConfig creep = 8;
 }
 
 // TODO(all) migrate all other traffic rules to pb config

modules/planning/tasks/traffic_decider/stop_sign.cc

@@ -327,7 +327,7 @@ bool StopSign::CheckADCkStop(ReferenceLineInfo* const reference_line_info) {
   CHECK_NOTNULL(reference_line_info);
 
   double adc_speed = reference_line_info->AdcPlanningPoint().v();
-  if (adc_speed > FLAGS_max_stop_speed) {
+  if (adc_speed > config_.stop_sign().max_stop_speed()) {
     ADEBUG << "ADC not stopped: speed[" << adc_speed << "]";
     return false;
   }