Independent, street address-level broadband data is essential for evaluating Internet infrastructure investments, such as the $42B Broadband Equity, Access, and Deployment (BEAD) program. Evaluating these investments requires longitudinal visibility into broadband availability, quality, and affordability, including data on pre-disbursement baselines and changes in providers' advertised plans. While such data can be obtained through Internet Service Provider (ISP) web interfaces, these workloads impose three fundamental system requirements: robustness to frequent interface evolution, extensibility across hundreds of providers, and low technical overhead for non-expert users. Existing systems fail to meet these three essential requirements. We present BQT+, a broadband plan measurement framework that replaces monolithic workflows with declarative state/action specifications. BQT+ models querying intent as an interaction state space, formalized as an abstract nondeterministic finite automaton (NFA), and selects execution paths at runtime to accommodate alternative interaction flows and localized interface changes. We show that BQT+ sustains longitudinal monitoring of 64 ISPs, supporting querying for over 100 ISPs. We apply it to two policy studies: constructing a BEAD pre-disbursement baseline and benchmarking broadband affordability across over 124,000 addresses in four states.

翻译：独立、街道地址级别的宽带数据对于评估互联网基础设施投资至关重要，例如420亿美元的宽带公平、接入与部署（BEAD）计划。评估这些投资需要纵向观测宽带可用性、质量与可负担性，包括资金拨付前的基线数据及运营商广告套餐的变更信息。虽然此类数据可通过互联网服务提供商（ISP）的网页接口获取，但这类工作负载存在三个基本系统需求：对频繁接口演化的稳健性、跨数百家提供商的可扩展性，以及面向非专业用户的技术低门槛。现有系统均无法同时满足这三项核心要求。本文提出BQT+——一种通过声明式状态/动作规约替代单体工作流的宽带套餐测量框架。BQT+将查询意图建模为交互状态空间，形式化为抽象非确定性有限自动机（NFA），并在运行时选择执行路径以适应多分支交互流程与本地化界面变更。实验表明BQT+可持续监测64家ISP的纵向数据，并支持对超100家ISP的查询。我们将其应用于两项政策研究：构建BEAD资金拨付前基线，以及对四个州超124,000个地址的宽带可负担性进行基准评估。