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The major work of the Cijurey Dam Project Package III is located in Bogor Regency, West Java Province, which is a spillway structure consisting of iron structures and concrete structures. To achieve the right quality, on time, on cost, and zero accidents, concrete casting calculations and appropriate work implementation methods are required. This research method uses descriptive with quantitative and qualitative approaches. The stages of concrete casting work for the Cijurey Dam spillway structure's launch channel consist of preparation, measuring the launch channel block boundaries, lean concrete work, reinforcement work, formwork panel preparation, formwork panel installation, waterstop and dowel bar work, concrete sampling and slump test, concrete casting, concrete curing/maintenance, formwork dismantling, and finishing of tierod holes. The results of the study showed that the calculations for casting the concrete channel were a large volume of concrete channel casting of 135,000 m3, concrete material requirements (in the form of: 1,115,100 sacks of cement, 58,050 m3 of sand, 1,020,600 m3 of gravel, and 29,025,000 liters of water), channel formwork (surface area) of 27,675 m2, productivity of casting the concrete channel launcher of 24 m3/hour or 193 m3/day, and the efficiency of casting the concrete channel launcher time of around 125% (25% faster than planned). Meanwhile, the stages of work implementation for channel concrete casting include preparation work, measurement work for the boundaries of the launcher channel blocks, lean concrete work, reinforcement work, formwork panel preparation work, formwork lubrication work, formwork panel installation work, waterstop and dowel bar work, concrete sampling and slump test work, channel concrete casting work, concrete curing/maintenance work, formwork dismantling work, and finishing work for tierod holes. In addition, an inter-segment locking system with a shear key is used to overcome problems with the concrete pump, joint inspections are carried out during mobilization, routine inspections, repairs and replacement of the concrete pump.

The high number of work accidents indicates that the implementation of Occupational Safety and Health (K3) is still not optimal, particularly in the construction industry. Vocational schools (SMK) can foster awareness from an early age through education and training. Students in general are not aware of the potential for workplace accidents yet. K3 education for students from an early age can help provide a beneficial understanding and foster attitudes and habits to apply K3 in their future work environments. The purpose of this program is to provide understanding and basic knowledge of construction K3 to students of SMKN 4 Gowa. The method used to educate students through this K3 learning is lectures and socialization, as well as evaluation through pre-tests and post-tests. Overall, the results show that this K3 education activity helps students in the Building Modeling and Information Design program at SMKN 4 Gowa understand all the topics that were talked about. These include understanding K3 and the Zero Accident goal, the importance of construction K3, potential hazards in construction, methods of hazard identification and risk assessment, risk control, recognizing personal protective equipment, symbols and signs, and learning about work accidents that happen in Indonesia.

PT.PP London Sumatra Indonesia Tbk combines the objectives of occupational safety and health into the management system at all levels of the company.  Management is responsible for preventing injuries and diseases due to work.  PT.PP London Sumatra Indonesia Tbk has succeeded in implementing an occupational safety and health management system to minimize work accidents.  The occupational safety and health management system program has been established in oil palm factory in the form of recruitment, education and training, counseling, use of personal protective equipment and appreciation.  Evaluation of the P2K3 work program on K3 policy can produce results, namely the acquisition of zero accident in the palm oil mill environment, in the factory environment there are no work accidents that cause loss of employee working days.  The influence and application of SMK3 can be proven from the lack of work accidents in the palm oil mill environment, and several awards are obtained about occupational safety.  PT.  PP London Sumatra Indonesia, Tbk was given a zero accident award for its achievements in implementing the Occupational Safety and Health Program (K3) so as to reach 2,596,288 working hours of people without work accidents, starting from January 1, 2012 to March 31  2016. Then won a gold flag award in SMK3 in Begerpang POM in 2009 and 2012. In the framework of implementing Government No. 50 of 2012 concerning the application of SMK3 in the workplace.

Bicycles are affordable and healthy, cause zero harm to the environment, require little space on roads and parks, and are not noisy transportation means. However, cyclists face challenges on roads, which may lead to injuries and deaths. For instance, cyclists visibility, speed management, ability to communicate with other road users, backward accidents, and ability to be located in urgent cases. This paper presents performance, tracking, and safety systems from hardware and software point of view. As a result, cyclists monitor their speed to manage; their locations are tracked, and their cycling paths are traced. Also, a rear red light and turn signal LEDs are activated without any physical action from the rider to communicate with other drivers. Moreover, a microwave radar sensor with a range of seven meters is employed to protect the cyclist from backward-approaching vehicles. Finally, three Arduino UNO boards with GPS, GSM modules, MPU-6050, and RCWL-0516 sensors are mounted on a conventional bicycle to provide safer trips.