The following are snippets of Peering Policy Clauses found in the Peering Rules of the Road - A Brief Study of Peering Policies study.  Clauses were categorized and put into rough categories for comparison.

Here are the clauses we categorized as requirements for Peering Traffic Ratios

Excerpts from Peering Polices

Traffic Ratios

2.3 The ratio of the aggregate amount of traffic exchanged between the Requester and the AboveNet with which it seeks to interconnect shall be roughly balanced and shall not exceed bidirectional ratio of 2:1. –AboveNet

Traffic Exchange Ratio. The ratio of the aggregate amount of traffic exchanged between the Requester and the Verizon Business Internet Network with which it seeks to interconnect shall be roughly balanced and shall not exceed 1.8:1. – Verizon

The traffic ratio should be reasonably balanced and no more than 2:1. – ATDN

Applicant must maintain a traffic scale between its network and Comcast that enables a general balance of inbound versus outbound traffic. The network cost burden for carrying traffic between networks shall be similar to justify SFI. – Comcast

#  Applicant must meet a minimum traffic ratio of 1:3 – tinet

Potential peer must not exceed a usage ratio of 3:1, in either direction for a period greater than 30 days, unless otherwise expressed and agreed to in writing. – CableVision

Traffic Ratios: Interconnect Candidate will have a 1.5:1 aggregate traffic ratio with 5 Gbps sustained bi-directional traffic flows, measured at 95% peak. The traffic must be balanced across three time zones. The Interconnection Candidate must provide 24-hour peak and average traffic volume statistics at each Interconnection Point. The quantity and speed of circuits between Qwest and Interconnection Candidate will be determined by overall traffic between the two parties, and will be reviewed periodically. – Qwest

Peer must maintain a balanced traffic ratio between its network and AT&T. In particular, a new peer must have:

  * No more than a 2.00:1 ratio of traffic into AT&T: out of AT&T, on average each month.   

* A reasonably low peak-to-average ratio.

-- AT&T