|
| Variable | Description/value |
|
| Traffic characteristics | |
| Speed-related | |
| SpR (t, l) | Ratio of speed at time t in segment l to recurrent speed at the same time and location. |
| SdR (t-15: t+15, l) | Standard deviation of SpR from 15 mins before to 15 mins after time t in segment l. |
| UpSdR (t-15: t+15, l+1, l) | Ratio of SdR in upstream segment (US) at the same increment of time. |
| DownSdR (t-15: t+15, l-1, l) | Ratio of SdR in downstream segment (DS) at the same increment of time. |
| AvgR (t: t+15, l) | Average of consecutive SpRs from time t to 15 minutes after in segment l. |
| UpAvgR (t: t+15, l+1) | AvgR of US within same increment of time. |
| DownAvgR (t: t+15, l-1) | AvgR of DS within same increment of time. |
| U/CAvgR (t: t+15, l+1, l) | Ratio of AvgR in US to chosen segment at the same increment of time. |
| D/CAvgR (t: t+15, l-1, 1) | Ratio of AvgR in DS to chosen segment at the same increment of time. |
| D/UAvgR (t: t+15, l-1, 1+1) | Ratio of AvgR in DS to US at the same increment of time. |
| Travel time-related | |
| EBTI (t: t+15, l) | EBTI of consecutive timestamps from time t to 15 minutes after in segment l. |
| UpEBTI (t: t+15, l+1) | EBTI of US within same increment of time. |
| DownEBTI (t: t+15, l+1) | EBTI of DS within same increment of time. |
| U/CEBTI (t: t+15, l+1) | Ratio of EBTI in US to chosen segment at the same increment of time. |
| D/CEBTI (t: t+15, l-1) | Ratio of EBTI in DS to chosen segment at the same increment of time. |
| D/UEBTI (t: t+15, l-1, 1+1) | Ratio of EBTI in DS to US at the same increment of time. |
| Temporal characteristic | |
| Peak | peak period (5 : 30 – 9 : 30, 15 : 00 – 19 : 00); . |
|
