Equalized Coverage in Motion Control Performance Prediction for Self-Adaptive Road Vehicles
Pith reviewed 2026-05-20 04:42 UTC · model grok-4.3
The pith
A conformalized quantile regression model with equalized coverage predicts whether automated vehicles can maintain low lateral deviation despite actuator degradations or failures.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
We propose a lightweight prediction model based on conformalized quantile regression that predicts whether an automated vehicle can be controlled with sufficiently low lateral deviation from a planned trajectory under nominal, degraded, and failed actuator conditions, employing equalized coverage methods to ensure conditional statistical guarantees.
What carries the argument
Conformalized quantile regression with equalized coverage, which provides prediction intervals with statistical guarantees that adapt to different regimes in the data.
If this is right
- The model can serve as a heuristic for determining the admissible action space during runtime behavior generation.
- It supports capability-based behavior in automated driving systems by evaluating remaining performance under degradation.
- The approach addresses monitoring needs for system elements that degrade and fail.
- Statistical guarantees hold conditionally for different actuator conditions rather than only marginally.
Where Pith is reading between the lines
- If the model is accurate, it could be integrated into real-time decision making to avoid unsafe maneuvers under failure.
- Extending this to other vehicle dynamics or sensor degradations might broaden the applicability to broader self-adaptive systems.
- Testing on real-world data from diverse driving scenarios would validate the conditional coverage in practice.
Load-bearing premise
Statistical coverage guarantees must hold within specific data regimes like different actuator conditions, not only on average across all cases.
What would settle it
If empirical tests show that the actual coverage rate drops below the target level for data points corresponding to failed actuators, that would falsify the method's effectiveness.
Figures
read the original abstract
Automated driving systems require monitoring mechanisms to ensure operation as intended, especially when system elements degrade and/or fail. Hence, capability monitoring is crucial in order to evaluate the system's remaining performance and implement capability-based behavior. In this paper, we investigate the dynamics of a highly over-actuated automated vehicle under actuator degradations and failures, affecting the vehicle's motion control capabilities. We propose a lightweight prediction model based on conformalized quantile regression that predicts whether an automated vehicle can be controlled with sufficiently low lateral deviation from a planned trajectory under nominal, degraded, and failed actuator conditions. We recognize that statistical guarantees should hold not only across all data (marginal coverage) but also for different regimes within the data (conditional coverage). We therefore employ equalized coverage methods to address this challenge. During runtime behavior generation our predictor can provide a heuristic for determining the admissible action space. Its application and limitations are discussed in this paper.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript proposes a lightweight prediction model based on conformalized quantile regression with equalized coverage to predict whether an automated vehicle can maintain sufficiently low lateral deviation from a planned trajectory under nominal, degraded, and failed actuator conditions. The approach is motivated by the need for capability monitoring in self-adaptive road vehicles and aims to deliver statistical guarantees that hold conditionally across actuator regimes rather than only marginally.
Significance. If the conditional coverage property is empirically verified, the work would provide a practical, real-time tool for performance prediction in safety-critical autonomous driving, enabling better-informed behavior generation under actuator degradation. The focus on equalized coverage directly targets a known limitation of standard conformal prediction and is well-motivated for regime-specific reliability in over-actuated vehicle control.
major comments (1)
- [§4] §4 (Numerical Experiments) and associated tables/figures: the central claim that equalized coverage yields reliable conditional guarantees across the three actuator regimes (nominal, degraded, failed) is load-bearing for the paper's contribution to capability monitoring. However, coverage metrics appear to be reported only in aggregate form without separate empirical coverage rates, calibration plots, or per-regime tables for each actuator condition. This leaves the conditional coverage advantage over ordinary conformal prediction unverified and weakens support for the runtime heuristic application.
minor comments (2)
- [§3] The description of how equalized coverage is adapted to the specific actuator regimes could be expanded with a short algorithmic outline or pseudocode for clarity.
- [Figures] Figure captions should explicitly state the number of trials or data points used for each coverage evaluation to aid reproducibility.
Simulated Author's Rebuttal
We thank the referee for their constructive feedback on our manuscript. We have addressed the major comment regarding the presentation of conditional coverage results and revised the manuscript accordingly to strengthen the empirical support for our claims.
read point-by-point responses
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Referee: [§4] §4 (Numerical Experiments) and associated tables/figures: the central claim that equalized coverage yields reliable conditional guarantees across the three actuator regimes (nominal, degraded, failed) is load-bearing for the paper's contribution to capability monitoring. However, coverage metrics appear to be reported only in aggregate form without separate empirical coverage rates, calibration plots, or per-regime tables for each actuator condition. This leaves the conditional coverage advantage over ordinary conformal prediction unverified and weakens support for the runtime heuristic application.
Authors: We agree that explicit per-regime verification is important for supporting the conditional coverage claim and its relevance to capability monitoring. In the revised manuscript, we have added a new table (Table 4) reporting empirical coverage rates separately for the nominal, degraded, and failed actuator regimes, along with calibration plots (new Figure 7) that visualize coverage as a function of the conformity score for each regime. These additions directly compare the equalized coverage approach against standard conformal prediction and demonstrate improved conditional performance in the degraded and failed cases. We believe this addresses the concern and bolsters the justification for using the predictor as a runtime heuristic. revision: yes
Circularity Check
No circularity: proposal relies on established conformal methods without self-referential reductions
full rationale
The paper proposes a lightweight prediction model based on conformalized quantile regression with equalized coverage to predict low lateral deviation under nominal, degraded, and failed actuator conditions. No equations, derivations, or parameter-fitting steps are shown that would reduce any prediction to a fitted input by construction. The abstract explicitly states that equalized coverage methods are employed to address conditional coverage, but this is presented as an application of known techniques rather than a self-defined or self-cited uniqueness result. The central claim remains independent of any load-bearing self-citation chain or renaming of empirical patterns within the visible text.
Axiom & Free-Parameter Ledger
axioms (1)
- domain assumption Conformal prediction assumptions hold for the vehicle trajectory deviation data across nominal, degraded, and failed regimes.
Reference graph
Works this paper leans on
-
[1]
AUTOtech.agil: Architecture and Technologies for Orchestrating Automotive Agility,
R. van Kempen et al., “AUTOtech.agil: Architecture and Technologies for Orchestrating Automotive Agility,” inProc. 32. Aachen Colloq. Sustain. Mobility, 2023
work page 2023
-
[2]
R. Schubert et al.,Architectural Requirements for Self-Aware and Self-Adaptive Automated Driving Systems: A Literature Review, to be published, 2026, Accessed: Feb. 23 2026
work page 2026
-
[4]
R. Schubert et al., “Conformal Prediction of Motion Control Performance for an Automated Vehicle in Presence of Actuator Degradations and Failures,” inProc. Int. Conf. Intell. Transp. Syst., DOI: 10.1109/ITSC58415.2024.10920241, IEEE, 2024
-
[5]
Towards a Functional System Architecture for Automated Vehicles
S. Ulbrich et al., “Towards a functional system architecture for automated vehicles,”arXiv:1703.08557, 2017
work page internal anchor Pith review Pith/arXiv arXiv 2017
-
[6]
T. Stolte et al., “A Taxonomy to Unify Fault Tolerance Regimes for Automotive Systems: Defining Fail-Operational, Fail-Degraded, and Fail-Safe,”IEEE Trans. Intell. V ehicles, 2021
work page 2021
-
[7]
M. Nolte, I. Jatzkowski, S. Ernst, and M. Maurer, “Supporting Safe Decision Making Through Holistic System-Level Representations & Monitoring – A Summary and Taxonomy of Self-Representation Concepts for Automated Vehicles,”arXiv:2007.13807, 2020
-
[8]
M. Nolte, S. Ernst, J. Richelmann, and M. Maurer, “Representing the Unknown – Impact of Uncertainty on the Interaction between Decision Making and Trajectory Generation,” inProc. 21st Int. Conf. Intell. Transp. Syst. (ITSC), DOI: 10.1109/itsc.2018.8569490, 2018, pp. 2412–2418
-
[9]
L. Yuan, “End-to-end system architectures in autonomous driving: Comparative analysis against modular design and technological exploration,” inProc. Int. Conf. Mach. Learn. Automat., doi: 10.54254/2755-2721/102/20241031, vol. 102, 2024, pp. 141–147
-
[10]
Conformalized Quantile Regression,
Y . Romano, E. Patterson, and E. Candes, “Conformalized Quantile Regression,” inProc. Advances Neural Inf. Process. Syst., vol. 32, 2019
work page 2019
-
[11]
With malice toward none: Assessing uncertainty via equalized coverage,
Y . Romano, R. F. Barber, C. Sabatti, and E. Cand`es, “With malice toward none: Assessing uncertainty via equalized coverage,”Harvard Data Sci. Rev., vol. 2, no. 2, p. 4, 2020, DOI: 10.1162/99608f92.03f00592
-
[12]
P. J. Antsaklis and K. M. Passino,An Introduction to Intelligent and Autonomous Control. Kluwer Academic Publishers, 1993
work page 1993
-
[13]
Flexible Automatisierung von Straßenfahrzeugen mit Rechnersehen,
M Maurer, “Flexible Automatisierung von Straßenfahrzeugen mit Rechnersehen,” PhD Thesis, Uni. der Bundw., 2000
work page 2000
-
[14]
Komponenten zur automatischen Fahrzeugfuhrung in sehenden (semi-)autonomen Fahrzeugen,
K.-H. Siedersberger, “Komponenten zur automatischen Fahrzeugfuhrung in sehenden (semi-)autonomen Fahrzeugen,” PhD Thesis, Universit ¨at der Bundeswehr, 2003
work page 2003
-
[15]
Verhaltensentscheidung f ¨ur automatische Fahrzeuge mit Blickrichtungssteuerung,
M. Pellkofer, “Verhaltensentscheidung f ¨ur automatische Fahrzeuge mit Blickrichtungssteuerung,” PhD Thesis, Uni. der Bundw., 2003
work page 2003
-
[16]
M. Nolte, “Werte- und f ¨ahigkeitsbasierte Bewegungsplanung f ¨ur autonome Straßenfahrzeuge – Ein systemischer Ansatz,” PhD Thesis, TU Braunschweig, 2024
work page 2024
-
[17]
A. Reschka, “Fertigkeiten- und F ¨ahigkeitengraphen als Grundlage des sicheren Betriebs von automatisierten Fahrzeugen im ¨offentlichen Straßenverkehr,” PhD Thesis, TU Braunschweig, 2017
work page 2017
-
[18]
Zum Fahrman ¨overbegriff im Kontext automatisierter Straßenfahrzeuge,
I. Jatzkowski et al., “Zum Fahrman ¨overbegriff im Kontext automatisierter Straßenfahrzeuge,” Tech. Rep., 2021
work page 2021
-
[19]
Towards a skill- and ability-based development process for self-aware automated road vehicles,
M. Nolte et al., “Towards a skill- and ability-based development process for self-aware automated road vehicles,” inProc. ITSC, DOI: 10.1109/itsc.2017.8317814, 2017, pp. 1–6
-
[20]
Towards Safety Concepts for Automated Vehicles by the Example of the Project UNICARagil,
T. Stolte et al., “Towards Safety Concepts for Automated Vehicles by the Example of the Project UNICARagil,” inProc. 29th Aachen Colloq. Sustain. Mobility, 2020
work page 2020
-
[21]
Crash-Prone Fault Combination Identification for Over-Actuated Vehicles During Evasive Maneuvers,
A. Da Silva, C. Birkner, R. N. Jazar, and H. Marzbani, “Crash-Prone Fault Combination Identification for Over-Actuated Vehicles During Evasive Maneuvers,”IEEE Access, vol. 12, pp. 37 256–37 275, 2024, DOI: 10.1109/access.2024.3374524
-
[22]
E. Ratner, C. J. Tomlin, and M. Likhachev, “Operating with Inaccurate Models by Integrating Control-Level Discrepancy Information into Planning,” inProc. Int. Conf. Robot. Automat. (ICRA), DOI: 10.1109/icra48891.2023.10161389, 2023, pp. 7823–7829
-
[23]
Active Learning of Abstract Plan Feasibility,
M. Noseworthy et al., “Active Learning of Abstract Plan Feasibility,” in Proc. Robot. Sci. Syst. XVII, 2021
work page 2021
-
[24]
Recursively Feasible Probabilistic Safe Online Learning with Control Barrier Functions,
F. Castaneda et al., “Recursively Feasible Probabilistic Safe Online Learning with Control Barrier Functions,” inProc. arXiv preprint, arXiv:2208.10733, arXiv, 2023
-
[25]
Learning When to Trust a Dynamics Model for Planning in Reduced State Spaces,
D. McConachie, T. Power, P. Mitrano, and D. Berenson, “Learning When to Trust a Dynamics Model for Planning in Reduced State Spaces,”Robot. Automat. Lett., vol. 5, no. 2, pp. 3540–3547, 2020, DOI: 10.1109/lra.2020.2972858
-
[26]
Online Verification of Automated Road Vehicles Using Reachability Analysis,
M. Althoff and J. M. Dolan, “Online Verification of Automated Road Vehicles Using Reachability Analysis,”IEEE Trans. Robot., vol. 30, no. 4, pp. 903–918, 2014, DOI: 10.1109/TRO.2014.2312453
-
[27]
Hamilton-Jacobi reachability: A brief overview and recent advances,
S. Bansal, M. Chen, S. Herbert, and C. J. Tomlin, “Hamilton-Jacobi reachability: A brief overview and recent advances,” inProc. Conf. Decis. Control, DOI: 10.1109/cdc.2017.8263977, 2017, pp. 2242–2253
-
[28]
K. Leung et al., “On infusing reachability-based safety assurance within probabilistic planning frameworks for human-robot vehicle interactions,” inProc. Int. Symp. Exp. Robot., DOI: 10.1007/978-3-030-33950-0 48, 2020, pp. 561–574
-
[29]
M. Chen, “High dimensional reachability analysis: Addressing the curse of dimensionality in formal verification,” Electrical Engineering and Computer Sciences, Uni. California, Berkeley, Technical Report, 2017
work page 2017
-
[30]
A new strategy for verifying reach-avoid specifications in neural feedback systems,
S. I. Akinwande, S. M. Katz, M. J. Kochenderfer, and C. Barrett, “A new strategy for verifying reach-avoid specifications in neural feedback systems,” 2026. arXiv: 2601.08065[cs.AI]
-
[31]
Sampling-based reachability analysis: A random set theory approach with adversarial sampling,
T. Lew and M. Pavone, “Sampling-based reachability analysis: A random set theory approach with adversarial sampling,” inProc. Conf. robot Learn., 2021, pp. 2055–2070
work page 2021
-
[32]
Decomposition of Reachable Sets and Tubes for a Class of Nonlinear Systems,
M. Chen et al., “Decomposition of Reachable Sets and Tubes for a Class of Nonlinear Systems,”IEEE Trans. Autom. Control, vol. 63, no. 11, pp. 3675–3688, 2018, DOI: 10.1109/tac.2018.2797194
-
[33]
Damaged Airplane Trajectory Planning Based on Flight Envelope and Motion Primitives,
D. Asadi, M. Sabzehparvar, E. M. Atkins, and H. A. Talebi, “Damaged Airplane Trajectory Planning Based on Flight Envelope and Motion Primitives,”J. Aircr ., vol. 51, no. 6, pp. 1740–1757, 2014, DOI: 10.2514/1.C032422
-
[34]
Stochastic reachability of a target tube: Theory and computation,
A. P. Vinod and M. M. Oishi, “Stochastic reachability of a target tube: Theory and computation,”Automatica, vol. 125, p. 109 458, 2021, DOI: 10.1016/j.automatica.2020.109458
-
[35]
M. Tayal, A. Singh, P. Jagtap, and S. Kolathaya, “CP–NCBF: A Conformal Prediction-based Approach to Synthesize Verified Neural Control Barrier Functions,”arXiv preprint, 2025, arXiv:2503.17395, DOI: 10.48550/arXiv.2503.17395
-
[36]
J. Zhang, B. Hoxha, G. Fainekos, and D. Panagou, “Conformal Prediction in the Loop: Risk-Aware Control Barrier Functions for Stochastic Systems with Data-Driven State Estimators,”IEEE Control Syst. Lett., 2025, DOI: 10.1109/LCSYS.2025.3571828
-
[37]
A Gentle Introduction to Conformal Prediction and Distribution-Free Uncertainty Quantification
A. N. Angelopoulos and S. Bates, “A Gentle Introduction to Conformal Prediction and Distribution-Free Uncertainty Quantification,” inProc. arXiv preprint, arXiv:2107.07511 [cs, math, stat], arXiv, 2022
work page internal anchor Pith review Pith/arXiv arXiv 2022
-
[38]
L. Lindemann et al., “Formal Verification and Control with Conformal Prediction: Practical Safety Guarantees for Autonomous Systems,”IEEE Control Syst., 2025, DOI: 10.1109/MCS.2025.3611545
-
[39]
M. Nolte, R. Schubert, C. Reisch, and M. Maurer, “Sensitivity Analysis for Vehicle Dynamics Models – An Approach to Model Quality Assessment for Automated Vehicles,” inProc. Intell. V ehicles Symp. (IV), DOI: 10.1109/iv47402.2020.9304801, 2020, pp. 1162–1169
-
[40]
A survey of deep learning applications to autonomous vehicle control,
S. Kuutti et al., “A survey of deep learning applications to autonomous vehicle control,”IEEE Trans. Intell. Transp. Syst., vol. 22, no. 2, pp. 712–733, 2021, DOI: 10.1109/TITS.2019.2962338
-
[41]
ReachNN: Reachability Analysis of Neural-Network Controlled Systems,
C. Huang et al., “ReachNN: Reachability Analysis of Neural-Network Controlled Systems,”ACM Trans. Embed. Comput. Syst., vol. 18, no. 5s, pp. 1–22, 2019
work page 2019
-
[42]
Reachability Analysis of Neural Network Control Systems,
C. Zhang, W. Ruan, and P. Xu, “Reachability Analysis of Neural Network Control Systems,” inProc. AAAI Conf. Artif. Intell., vol. 37, 2023, pp. 15 218–15 226
work page 2023
-
[43]
Making the relationship between uncertainty estimation and safety less uncertain,
V . Aravantinos and P. Schlicht, “Making the relationship between uncertainty estimation and safety less uncertain,” inProc. Des., Automat. & Test Europe Conf. & Exhib., DOI: 10.23919/date48585.2020.9116541, IEEE, 2020, pp. 1139–1144
-
[44]
Online scalable gaussian processes with conformal prediction for guaranteed coverage,
J. Xu, Q. Lu, and G. B. Giannakis, “Online scalable gaussian processes with conformal prediction for guaranteed coverage,” inProc. ICASSP 2025-2025 IEEE Int. Conf. Acoust., Speech Signal Process. (ICASSP), IEEE, 2025, pp. 1–5
work page 2025
-
[45]
T. Stolte et al., “Toward Fault-Tolerant Vehicle Motion Control for Over-Actuated Automated Vehicles: A Non-Linear Model Predictive Approach,”IEEE Access, vol. 11, pp. 10 499–10 519, 2023, DOI: 10.1109/access.2023.3239518
-
[46]
Towards Functional Safety in Drive-by-Wire Vehicles,
P. Bergmiller, “Towards Functional Safety in Drive-by-Wire Vehicles,” PhD Thesis, TU Braunschweig, Braunschweig, 2014
work page 2014
-
[47]
M. Nolte, M. Rose, T. Stolte, and M. Maurer, “Model Predictive Control Based Trajectory Generation for Autonomous Vehicles – An Architectural Approach,” inProc. Intell. V ehicles Symp. (IV), DOI: 10.1109/ivs.2017.7995814, 2017, pp. 798–805
-
[48]
A Controller Framework for Autonomous Drifting: Design, Stability, and Experimental Validation,
R. Y . Hindiyeh and J. Christian Gerdes, “A Controller Framework for Autonomous Drifting: Design, Stability, and Experimental Validation,” J. Dynamic Syst., Meas., Control, vol. 136, no. 051015, 2014, DOI: 10.1115/1.4027471
-
[49]
R. Koenker and G. Bassett Jr, “Regression quantiles,”Econometrica: J. Econometric Soc., pp. 33–50, 1978, Publisher: JSTOR, DOI: 10.2307/1913643
-
[50]
An introduction to feature extraction,
I. Guyon and A. Elisseeff, “An introduction to feature extraction,” inFeature extraction: foundations and applications, DOI: 10.1007/978-3-540-35488-8 1, Springer, 2006, pp. 1–25
-
[51]
ODD-Centric Contextual Sensitivity Analysis Applied To A Non-Linear Vehicle Dynamics Model,
R. Schubert, M. Nolte, A. de La Fortelle, and M. Maurer, “ODD-Centric Contextual Sensitivity Analysis Applied To A Non-Linear Vehicle Dynamics Model,” inProc. IV, DOI: 10.1109/iv55152.2023.10186729, 2023, pp. 1–8
-
[52]
Z. Zhao, R. Anand, and M. Wang, “Maximum relevance and minimum redundancy feature selection methods for a marketing machine learning platform,”arXiv preprint arXiv:1908.05376, 2019. arXiv: 1908.05376 [stat.ML]
-
[53]
S. Mazzanti,mrmr: Minimum redundancy maximum relevance feature selection, https://github.com/smazzanti/mrmr, GitHub repository, version 0.2.9, accessed Feb. 2026, 2024, Accessed: Feb. 22 2026
work page 2026
-
[54]
A simple test for heteroscedasticity and random coefficient variation,
T. S. Breusch and A. R. Pagan, “A simple test for heteroscedasticity and random coefficient variation,”Econometrica, vol. 47, no. 5, pp. 1287–1294, 1979, DOI: 10.2307/1911963
-
[55]
Robust tests for the equality of variances,
M. B. Brown and A. B. Forsythe, “Robust tests for the equality of variances,”J. Amer . statistical Assoc., vol. 69, no. 346, pp. 364–367, 1974, DOI: 10.1080/01621459.1974.10482955
-
[56]
In: 2023 IEEE 26th International Conference on Intelligent Transportation Systems (ITSC), pp
R. Graubohm, N. F. Salem, M. Nolte, and M. Maurer, “On assumptions with respect to occlusions in urban environments for automated vehicle speed decisions,” inProc. Int. Conf. Intell. Transp. Syst., DOI: 10.1109/1TSC57777.2023.10422457, IEEE, 2023, pp. 738–745
-
[57]
Conformal prediction for semantically-aware autonomous perception in urban environments,
A. Doula, T. G ¨udelh¨ofer, M. M ¨uhlh¨auser, and A. S. Guinea, “Conformal prediction for semantically-aware autonomous perception in urban environments,” inProc. Conf. Robot Learn., 2023
work page 2023
-
[58]
Safe planning in dynamic environments using conformal prediction,
L. Lindemann, M. Cleaveland, G. Shim, and G. J. Pappas, “Safe planning in dynamic environments using conformal prediction,” IEEE Robot. Automat. Lett., vol. 8, no. 8, pp. 5116–5123, 2023, DOI: 10.1109/LRA.2023.3292071
-
[59]
Safe-enhanced autonomous driving technology using conformal prediction results,
J. Liang et al., “Safe-enhanced autonomous driving technology using conformal prediction results,”J. Phys.: Conf. Ser ., vol. 2861, no. 1, 2024, DOI: 10.1088/1742-6596/2861/1/012002
discussion (0)
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