| Article | Scope | Approach |
| Federal Highway Administration [6] | Policies and agency-level practices | Descriptive |
| Kurker et al. [7] | Early merge, late merge, signal merge | Microscopic traffic simulation |
| Lentzakis et al. [8] | Mainline metering/control | Microscopic traffic simulation |
| McCoy and Pesti [2] | Early merge, late merge, and dynamic late merge | Field test |
| Oner [9] | Temporary ramp metering | Process simulation |
| Pesti et al. [10] | Dynamic merge | Microscopic traffic simulation |
| Sun et al. [11] | Temporary ramp metering | Microscopic traffic simulation |
| Tympakianaki et al. [12] | Mainline metering/control | Microscopic traffic simulation |
| Wei et al. [1] | Dynamic late merge and Merge metering | Microscopic traffic simulation |