vgs_commons.h

#ifndef _VGS_COMMONS_H_
#define _VGS_COMMONS_H_

typedef enum {
        HEADWAY_CONSTANT = 1,   
        HEADWAY_UNIFORM,                
        HEADWAY_NORMAL,                 
        HEADWAY_EXPONENTIAL             
} vgs_headway_mode;

#endif /* _VGS_COMMONS_H_ */

---