| 1 | Please keep your mobile phone open during your shift. | |
| 2 | We hope the government can take measures to reduce traffic congestion and improve flow. | |
| 3 | In crowded cities, public transportation is key to improving traffic flow. | |
| 4 | In order to improve road flow, we need to construct some new highways. | |
| 5 | Designing better roads and traffic signals is necessary for smooth traffic flow. |
